Assets: UNESCO ( 6-digit codes)

UNESCO Nomenclature (more properly UNESCO nomenclature for fields of science and technology) is a system developed by UNESCO for classification of research papers and doctoral dissertations. There are three versions of the system, offering different levels of refinement through 2-, 4-, and 6-digit codes. This page describes the 6-digit nomenclature (2.235 6-digit names).

  • 11 Logic
    • 1101 Application of logic
    • 1102 Deductive logic
      • 1102.01 Analogy
      • 1102.02 Boolean Algebra
      • 1102.03 Formal Logic
      • 1102.04 Formalized languages
      • 1102.05 Formal systems
      • 1102.06 Foundations of mathematics
      • 1102.07 Generalization
      • 1102.08 Mathematical logic
      • 1102.09 Modal Logic
      • 1102.10 Model theory
      • 1102.11 Proof theory
      • 1102.12 Propositional Calculus
      • 1102.13 Recursive functions
      • 1102.14 Symbolic logic
      • 1102.15 Theory of formal languages
      • 1102.99 Other (specify)
    • 1103 General logic
    • 1104 Inductive logic
      • 1104.01 Induction
      • 1104.02 Intuitionism
      • 1104.03 Probability
      • 1104.99 Other (specify)
    • 1105 Methodology
      • 1105.01 Scientific method
      • 1105.99 Other (specify)
    • 1199 Other specialities relating to logic
  • 12 Mathematics
    • 1201 Algebra
      • 1201.01 Algebraic geometry
      • 1201.02 Axiomatic set theory
      • 1201.03 Category theory
      • 1201.04 Differential algebra
      • 1201.05 Fields, rings, algebra
      • 1201.06 Groups, generalizations
      • 1201.07 Homological algebra
      • 1201.08 Lattices
      • 1201.09 Lie algebra
      • 1201.10 Linear algebra
      • 1201.11 Matrix theory
      • 1201.12 Non-associative algebras
      • 1201.13 Polynomials
      • 1201.14 Representation theory
      • 1201.99 Other (specify)
    • 1202 Analysis and functional analysis
      • 1202.01 Algebra of operators
      • 1202.02 Approximation theory
      • 1202.03 Banach spaces and algebras
      • 1202.04 Calculus of variations
      • 1202.05 Combinatorial analysis
      • 1202.06 Convexity, Inequalities
      • 1202.07 Difference equations
      • 1202.08 Functional equations
      • 1202.09 Functions of a complex variable
      • 1202.10 Functions of real variables
      • 1202.11 Functions of several complex variables
      • 1202.12 Global Analysis
      • 1202.13 Harmonic analysis
      • 1202.14 Hilbert Spaces
      • 1202.15 Integral equations
      • 1202.16 Integral transforms
      • 1202.17 Measure, integration, area
      • 1202.18 Operational calculus
      • 1202.19 Ordinary differential equations
      • 1202.20 Partial differential equations
      • 1202.21 Potential theory
      • 1202.22 Series, summability
      • 1202.23 Special functions
      • 1202.24 Subharmonic functions
      • 1202.25 Topological linear spaces
      • 1202.26 Trigonometric series and integrals
      • 1202.99 Other (specify)
    • 1203 Computer Sciences
      • 1203.01 Accounting
      • 1203.02 Algorithmic languages
      • 1203.03 Analog computing
      • 1203.04 Artificial Intelligence
      • 1203.05 Automated manufacturing systems
      • 1203.06 Automated quality control systems
      • 1203.07 Causal modelling
      • 1203.08 Codes and coding systems
      • 1203.09 Computer-assisted design
      • 1203.10 Computer-assisted instruction
      • 1203.11 Computer software
      • 1203.12 Data banks
      • 1203.13 Digital computing
      • 1203.14 Environmental control systems
      • 1203.15 Heuristics
      • 1203.16 Hybrid computing
      • 1203.17 Informatics
      • 1203.18 Information systems and components; design and components
      • 1203.19 Inventory Control
      • 1203.20 Medical monitoring systems
      • 1203.21 Navigation and space telemetry systems
      • 1203.22 Production control systems
      • 1203.23 Programming languages
      • 1203.24 Programming theory
      • 1203.25 Sensors systems design
      • 1203.26 Simulation
      • 1203.99 Other (specify)
    • 1204 Geometry
      • 1204.01 Affine geometry
      • 1204.02 Complex manifolds
      • 1204.03 Convex domains
      • 1204.04 Differential geometry
      • 1204.05 Extremum problems
      • 1204.06 Euclidean geometry
      • 1204.07 Finite geometries
      • 1204.08 Foundations
      • 1204.09 Non-Euclidean geometries
      • 1204.10 Projective geometry
      • 1204.11 Riemannian geometry
      • 1204.12 Tensor Analysis
      • 1204.99 Other (specify)
    • 1205 Number theory
      • 1205.01 Algebraic numbers theory
      • 1205.02 Analytic number theory
      • 1205.03 Diophantine problems
      • 1205.04 Elementary number theory
      • 1205.05 Geometry of numbers
      • 1205.99 Other (specify)
    • 1206 Numerical analysis
      • 1206.01 Algorithms construction
      • 1206.02 Differential equations
      • 1206.03 Error analysis
      • 1206.04 Functional Equations
      • 1206.05 Integral equations
      • 1206.06 Integro-differential equations
      • 1206.07 Interpolation, approximation and curve fitting
      • 1206.08 Iterative Methods
      • 1206.09 Linear Equations
      • 1206.10 Matrices
      • 1206.11 Numerical differentiation
      • 1206.12 Ordinary differential equations
      • 1206.13 Partial differential equations
      • 1206.14 Quadratura
      • 1206.99 Other (specify)
    • 1207 Operations research
      • 1207.01 Activity analysis
      • 1207.02 Control systems
      • 1207.03 Cybernetics
      • 1207.04 Distribution and transport
      • 1207.05 Dynamic programming
      • 1207.06 Game theory
      • 1207.07 Integer programming
      • 1207.08 Inventory
      • 1207.09 Linear programming
      • 1207.10 Networks flow
      • 1207.11 Non-linear Programming
      • 1207.12 Queuing
      • 1207.13 Scheduling
      • 1207.14 Systems formulation
      • 1207.15 Systems reliability
      • 1207.99 Other (specify)
    • 1208 Probability
      • 1208.01 Actuarial mathematics
      • 1208.02 Analytic probability theory
      • 1208.03 Application of probability
      • 1208.04 Foundations of probability
      • 1208.05 Limit theorems
      • 1208.06 Markov processes
      • 1208.07 Plausibility
      • 1208.08 Stochastic processes
      • 1208.09 Subjective probabilities
      • 1208.99 Other (specify)
    • 1209 Statistics
      • 1209.01 Analytical statistics
      • 1209.02 Computing for statistics
      • 1209.03 Data analysis
      • 1209.04 Decision procedures and theory
      • 1209.05 Design and analysis of experiments
      • 1209.06 Distribution-free and nonparametric methods
      • 1209.07 Distribution and probability theory
      • 1209.08 Foundations of statistical inference
      • 1209.09 Multivariate analysis
      • 1209.10 Sampling theory and techniques
      • 1209.11 Stochastic theory and time series analysis
      • 1209.12 Techniques of statistical association
      • 1209.13 Techniques of statistical inferenc
      • 1209.14 Techniques of statistical prediction
      • 1209.15 Time series
      • 1209.99 Other (specify)
    • 1210 Topology
      • 1210.01 Abstract spaces
      • 1210.02 Cohomology
      • 1210.03 Differential manifolds
      • 1210.04 Fibre bundles and spaces
      • 1210.05 General topology
      • 1210.06 Homology
      • 1210.07 Homotopy
      • 1210.08 Lie groups
      • 1210.09 Piecewise linear topology
      • 1210.10 Point-set topology
      • 1210.11 Three dimensional topology
      • 1210.12 Topological groups
      • 1210.13 Topological dynamics
      • 1210.14 Topological embedding
      • 1210.15 Topological manifolds
      • 1210.16 Transformation groups
      • 1210.99 Other (specify)
    • 1299 Other mathematical specialities
  • 21 Astronomy, Astrophysics
    • 2101 Cosmology and Cosmogony
      • 2101.01 Binary stars
      • 2101.02 Clusters
      • 2101.03 Cosmic Rays
      • 2101.04 Galaxies
      • 2101.05 Gravitation
      • 2101.06 Nebulae
      • 2101.07 Novae
      • 2101.08 Pulsars
      • 2101.09 Quasars
      • 2101.10 Stars
      • 2101.11 Stellar evolution and HR diagram
      • 2101.12 Stellar composition
      • 2101.13 Super-novae
      • 2101.14 Variable stars
      • 2101.15 X-ray sources
      • 2101.99 Other (specify)
    • 2102 Interplanetary medium
      • 2102.01 Interplanetary fields
      • 2102.02 Interplanetary matter
      • 2102.03 Interplanetary particles
      • 2102.99 Other (specify)
    • 2103 Optical astronomy
      • 2103.01 Position astronomy
      • 2103.02 Telescopes
      • 2103.03 Spectroscopy
      • 2103.99 Other (specify)
    • 2104 Planetology
      • 2104.01 Comets
      • 2104.02 Meteorites
      • 2104.03 Planetary atmospheres
      • 2104.04 Planetary geology
      • 2104.05 Planetary physics
      • 2104.06 Planetary magnetic fields
      • 2104.07 Planets
      • 2104.08 Satellites
      • 2104.09 Tektites
      • 2104.10 The Moon
      • 2104.99 Other (specify)
    • 2105 Radio-astronomy
      • 2105.01 Antennae
      • 2105.02 Radio-telescopes
      • 2105.99 Other (specify)
    • 2106 Solar system
      • 2106.01 Solar energy
      • 2106.02 Solar physics
      • 2106.03 Solar wind
      • 2106.04 The Sun
      • 2106.99 Other (specify)
    • 2199 Other astronomical specialities
  • 22 Physics
    • 2201 Acoustics
      • 2201.01 Acoustic properties of solids
      • 2201.02 Architectural Acoustics
      • 2201.03 Hearing (physics of)
      • 2201.04 Music (physics of)
      • 2201.05 Noise
      • 2201.06 Shock waves
      • 2201.07 Sonar
      • 2201.08 Speech (physics of)
      • 2201.09 Ultrasonics
      • 2201.10 Underwater sounds
      • 2201.11 Vibrations
      • 2201.99 Other (specify)
    • 2202 Electro-magnetism
      • 2202.01 Conductivity
      • 2202.02 Electrical quantities and their measurement
      • 2202.03 Electricity
      • 2202.04 Electromagnetic waves
      • 2202.05 Gamma rays
      • 2202.06 Infrared, visible and ultraviolet radiation
      • 2202.07 Interaction of electromagnetic waves with matter
      • 2202.08 Magnetism
      • 2202.09 Propagation of electromagnetic waves
      • 2202.10 Radiowaves and microwaves
      • 2202.11 Superconductivity
      • 2202.12 X-rays
      • 2202.99 Other (specify)
    • 2203 Electronics
      • 2203.01 Circuits
      • 2203.02 Circuit elements
      • 2203.03 Electron tubes
      • 2203.04 Electron Microscopy
      • 2203.05 Electron states
      • 2203.06 Electron transport
      • 2203.07 Integrated circuits
      • 2203.08 Photoelectricity
      • 2203.09 Piezo-electricity
      • 2203.99 Other (specify)
    • 2204 Fluids (physics of)
      • 2204.01 Colloids
      • 2204.02 Dispersions
      • 2204.03 Fluid flow
      • 2204.04 Fluid mechanics
      • 2204.05 Gases
      • 2204.06 High pressure phenomena
      • 2204.07 Ionisation
      • 2204.08 Liquids
      • 2204.09 Magnetofluid dynamics (Magnetofluidodinámica)
      • 2204.10 Plasmas (physics of)
      • 2204.11 Quantum fluids
      • 2204.99 Other (specify)
    • 2205 Mechanics
      • 2205.01 Analytical mechanics
      • 2205.02 Continuous mechanics
      • 2205.03 Elasticity
      • 2205.04 Fluid mechanics
      • 2205.05 Friction
      • 2205.06 Many body theory
      • 2205.07 Measurement of mechanical properties
      • 2205.08 Plasticity
      • 2205.09 Solid mechanics
      • 2205.10 Statistical mechanics
      • 2205.99 Other (specify)
    • 2206 Molecular physics
      • 2206.01 Free radicals
      • 2206.02 Inorganic molecules
      • 2206.03 Macromolecules
      • 2206.04 Mesic and muonic molecules
      • 2206.05 Molecular beams
      • 2206.06 Molecular ions
      • 2206.07 Molecular spectroscopy
      • 2206.08 Molecular structure
      • 2206.09 Organic molecules
      • 2206.10 Polymers (physics of)
      • 2206.99 Other (specify)
    • 2207 Nuclear physics
      • 2207.01 Atomic beams
      • 2207.02 Atomic ions
      • 2207.03 Atomic physics
      • 2207.04 Atoms with Z greater than 2
      • 2207.05 Collision processes
      • 2207.06 Electron beams
      • 2207.07 Electron paramagnetic resonance
      • 2207.08 Electron spin resonance
      • 2207.09 Energy Conversion
      • 2207.10 Fission (nuclear)
      • 2207.11 Helium atom
      • 2207.12 Hydrogen atom
      • 2207.13 Isotopes
      • 2207.14 Nuclear decay
      • 2207.15 Nuclear Energy
      • 2207.16 Nuclear magnetic resonance
      • 2207.17 Nuclear reaction and scattering
      • 2207.18 Nuclear reactors
      • 2207.19 Nuclear structure
      • 2207.20 Radioisotopes
      • 2207.21 Thermonuclear fusion
      • 2207.90 Low energy experimental nuclear physics
      • 2207.99 Other (specify)
    • 2208 Nucleonics
      • 2208.01 Beam handling
      • 2208.02 Beam sources
      • 2208.03 Fusion reactors
      • 2208.04 Nuclei
      • 2208.05 Particle accelerators
      • 2208.06 Particle detectors
      • 2208.07 Particle physics
      • 2208.08 Particles sources
      • 2208.09 Plasma Containment
      • 2208.99 Other (specify)
    • 2209 Optics
      • 2209.01 Absorption spectroscopy
      • 2209.02 Cinematography
      • 2209.03 Colorimetry
      • 2209.04 Emission spectroscopy
      • 2209.05 Fibre Optics
      • 2209.06 Geometric optics
      • 2209.07 Holography
      • 2209.08 Ilumination
      • 2209.09 Infrared radiation
      • 2209.10 lasers
      • 2209.11 Light
      • 2209.12 Microscopes
      • 2209.13 Non-linear Optics
      • 2209.14 Optical properties of solids
      • 2209.15 Optometry
      • 2209.16 Photographic instrumentation
      • 2209.17 Photography
      • 2209.18 Photometry
      • 2209.19 Physical optics
      • 2209.20 Radiometry
      • 2209.21 Spectroscopy
      • 2209.22 Ultra-violet radiation
      • 2209.23 Visible radiation
      • 2209.24 Vision (physics of)
      • 2209.90 Digital treatment. Images
      • 2209.99 Other (specify)
    • 2210 Physical chemistry
      • 2210.01 Catalysis
      • 2210.02 Chemical and phase equilibrium
      • 2210.03 Chemical kinetics
      • 2210.04 Colloids chemistry
      • 2210.05 Electrochemistry
      • 2210.06 Electrolytes
      • 2210.07 Electronic spectroscopy
      • 2210.08 Emulsions
      • 2210.09 Energy transfer
      • 2210.10 Fast reactions; explosives
      • 2210.11 Flames
      • 2210.12 Fuel cells (theory of)
      • 2210.13 Fused salts
      • 2210.14 Gas phase physics
      • 2210.15 High temperatures chemistry
      • 2210.16 Interfacial chemistry
      • 2210.17 Ion exchange
      • 2210.18 liquid state physics
      • 2210.19 Membrane phenomena
      • 2210.20 Molecular spectroscopy
      • 2210.21 Phase equilibria
      • 2210.22 Photochemistry
      • 2210.23 Quantum theory
      • 2210.24 Radiochemistry
      • 2210.25 Relation processes
      • 2210.26 Scattering phenomena
      • 2210.27 States of matter
      • 2210.28 Solid state chemistry
      • 2210.29 Solid state physics
      • 2210.30 Solutions
      • 2210.31 Thermochemistry
      • 2210.32 Thermodynamics
      • 2210.33 Transport phenomena
      • 2210.34 Valence theory
      • 2210.90 Physical chemistry of Polymers
      • 2210.91 Physical Chemistry: Gas phase chemistry
      • 2210.93 Liquid crystals
      • 2210.99 Other (specify)
    • 2211 Solid state physics
      • 2211.01 Alloys
      • 2211.02 Composites
      • 2211.03 Crystal growth
      • 2211.04 Crystallography
      • 2211.05 Crystal structure
      • 2211.06 Dendrites
      • 2211.07 Dielectrics
      • 2211.08 Diffusion in solids
      • 2211.09 Electron carriers properties
      • 2211.10 Electron states
      • 2211.11 Electron transport properties
      • 2211.12 Imperfections
      • 2211.13 Interaction of radiation with solids
      • 2211.14 Interfaces
      • 2211.15 Lattice mechanics
      • 2211.16 Luminescence
      • 2211.17 Magnetic properties
      • 2211.18 Magnetic resonance
      • 2211.19 Mechanical properties
      • 2211.20 metallic conductors
      • 2211.21 Metallurgy
      • 2211.22 Metallography
      • 2211.23 Non-crystalline states
      • 2211.24 Optical properties
      • 2211.25 Semiconductors
      • 2211.26 Solid state devices
      • 2211.27 Superconductors
      • 2211.28 Surfaces
      • 2211.29 Thermal properties of solids
      • 2211.30 Tribology
      • 2211.90 Solid state physics. Thin sheet
      • 2211.91 Solid State physics. Solids spectroscopy
      • 2211.99 Other (specify)
    • 2212 Theoretical physics
      • 2212.01 Electromagnetic fields
      • 2212.02 Elementary particles
      • 2212.03 Energy (physics)
      • 2212.04 Fields
      • 2212.05 Gravitation
      • 2212.06 Gravitational fields
      • 2212.07 Gravitons
      • 2212.08 Hadrons
      • 2212.09 Leptons
      • 2212.10 Mass
      • 2212.11 Photons
      • 2212.12 Quantum field theory
      • 2212.13 Radiation (electromagnetic)
      • 2212.14 Theory of relativity
      • 2212.99 Other (specify)
    • 2213 Thermodynamics
      • 2213.01 Changes of state
      • 2213.02 Heat transfer (physics of)
      • 2213.03 High pressure
      • 2213.04 High temperature
      • 2213.05 Kinetic theory
      • 2213.06 Low temperatures
      • 2213.07 Phase transition
      • 2213.08 Thermal measurement techniques
      • 2213.09 Thermodynamic equilibria
      • 2213.10 Thermodynamic relationships
      • 2213.11 Transport phenomena
      • 2213.99 Other (specify)
    • 2214 Units and constants
      • 2214.01 Constants (physics)
      • 2214.02 Metrology
      • 2214.03 Standard units
      • 2214.04 Unit calibration
      • 2214.05 Unit conversion
      • 2214.99 Other (specify)
    • 2290 High energy Physics
      • 2290.01 Theoretical high energy physics
    • 2299 Other physical specialities
  • 23 Chemistry
    • 2301 Analytical chemistry
      • 2301.01 Absorption spectroscopy
      • 2301.02 Biochemical analysis
      • 2301.03 Chromatographic analysis
      • 2301.04 Electrochemical Analysis
      • 2301.05 Emission spectroscopy
      • 2301.06 Fluorimetry
      • 2301.07 Gravimetry
      • 2301.08 Infrared spectroscopy
      • 2301.09 Magnetic resonance spectroscopy
      • 2301.10 Mass spectroscopy
      • 2301.11 Microchemical analysis
      • 2301.12 Microscopy
      • 2301.13 Microwave spectroscopy
      • 2301.14 Phosphorimetry
      • 2301.15 Polymer analysis
      • 2301.16 Radiochemical analysis
      • 2301.17 Raman spectroscopy
      • 2301.18 Thermal analytical methods
      • 2301.19 Volumetry
      • 2301.20 X-Ray spectroscopy
      • 2301.99 Other (specify)
    • 2302 Biochemistry
      • 2302.01 Alkaloids
      • 2302.02 Amino Acids
      • 2302.03 Antimetabolites
      • 2302.04 Biochemical genetics
      • 2302.05 Biosynthesis
      • 2302.06 Chemotherapy
      • 2302.07 Clinical chemistry
      • 2302.08 Co-enzymes
      • 2302.09 enzymology
      • 2302.10 Essential oils
      • 2302.11 Fatty acids
      • 2302.12 Fermentation
      • 2302.13 Feedback regulation
      • 2302.14 Glucides
      • 2302.15 Hormones
      • 2302.16 Immunochemistry
      • 2302.17 Intermediary metabolism
      • 2302.18 Lipids
      • 2302.19 Metabolic processes
      • 2302.20 Microbiological chemistry
      • 2302.21 Molecular biology
      • 2302.22 Molecular pharmacology
      • 2302.23 Nucleic acids
      • 2302.24 Peptides
      • 2302.25 Photosynthesis
      • 2302.26 Physical biochemistry
      • 2302.27 Proteins
      • 2302.28 Starch
      • 2302.29 Steroids
      • 2302.30 Terpenes
      • 2302.31 Trace-elements
      • 2302.32 Vitamins
      • 2302.33 Waxes
      • 2302.90 Food biochemistry
      • 2302.91 Biological macromolecules chemistry
      • 2302.99 Other (specify)
    • 2303 Inorganic chemistry
      • 2303.01 Actinides chemistry
      • 2303.02 Alkaline earths
      • 2303.03 Alkaline elements
      • 2303.04 Boron compounds
      • 2303.05 Carbon
      • 2303.06 Chlorine compounds
      • 2303.07 Co-ordination compounds
      • 2303.08 Electron deficient compounds
      • 2303.09 Electropositive elements
      • 2303.10 Fluorine compounds
      • 2303.11 Germanium
      • 2303.12 Graphite
      • 2303.13 Halogens
      • 2303.14 Hydrogen
      • 2303.15 Hydrides
      • 2303.16 Inorganic reactions (mechanisms of)
      • 2303.17 Lead compounds
      • 2303.18 Metals
      • 2303.19 Metal alkyls
      • 2303.20 Nitrogen compounds
      • 2303.21 Organo-metallic compounds
      • 2303.22 Phosphorous compounds
      • 2303.23 Pigments chemistry
      • 2303.24 Rare earths
      • 2303.25 Sodium compounds
      • 2303.26 Structure of inorganic compounds
      • 2303.27 Sulfur compounds
      • 2303.28 Synthetic elements
      • 2303.29 Transition elements
      • 2303.30 Transuranic elements
      • 2303.31 Water chemistry
      • 2303.99 Other (specify)
    • 2304 Macromolecular chemistry
      • 2304.01 Cellular plastics
      • 2304.02 Cellulose
      • 2304.03 Composites polymers
      • 2304.04 Elastomers
      • 2304.05 Gums
      • 2304.06 High polymers
      • 2304.07 Inorganic polymers
      • 2304.08 Macromolecules
      • 2304.09 Modification of macromolecules
      • 2304.10 Monomers chemistry
      • 2304.11 Natural fibers
      • 2304.12 Network polymers
      • 2304.13 Polyelectrolytes
      • 2304.14 Polyesters
      • 2304.15 Polyethylene
      • 2304.16 Polymer analysis
      • 2304.17 Polymer in dispersed form
      • 2304.18 Polypeptides and proteins
      • 2304.19 Polysaccharides
      • 2304.20 Polystyrene
      • 2304.21 Polyurethanes
      • 2304.22 Stability of macromolecules
      • 2304.23 Synthesis of macromolecules
      • 2304.24 Synthetic fibres
      • 2304.99 Other (specify)
    • 2305 Nuclear chemistry
      • 2305.01 Hot atoms chemistry
      • 2305.02 Isotope tracers
      • 2305.03 Marked molecules
      • 2305.04 Radiation chemistry
      • 2305.05 Radiochemistry
      • 2305.06 Radioisotopes
      • 2305.07 Separation of isotopes
      • 2305.99 Other (specify)
    • 2306 Organic chemistry
      • 2306.01 Aliphatic hydrocarbons
      • 2306.02 Aromatic hydrocarbons
      • 2306.03 benzene derivatives
      • 2306.04 Bicyclic chemistry
      • 2306.05 Carbanion chemistry
      • 2306.06 Carbohydrates chemistry
      • 2306.07 Carbonium chemistry
      • 2306.08 Dyestuff chemistry
      • 2306.09 Free radicals
      • 2306.10 Heterocyclic compounds
      • 2306.11 Organometallic
      • 2306.12 Organophosphorus chemistry
      • 2306.13 Organosilicon chemistry
      • 2306.14 Organosulfur chemistry
      • 2306.15 Reaction Mechanisms
      • 2306.16 Stereochemistry and conformational analysis
      • 2306.17 Steroids chemistry
      • 2306.18 Structure of organic molecules
      • 2306.90 Organic natural products chemistry
      • 2306.91 Organic chemistry. Instrumental analysis
      • 2306.99 Other (specify)
    • 2307 Physical chemistry
    • 2390 Pharmaceutical chemistry
      • 2390.01 Design, synthesis and study of new drugs
    • 2399 Other chemical specialities
  • 24 Life Sciences
    • 2401 Animal Biology (Zoology)
      • 2401.01 Animal anatomy
      • 2401.02 Animal behaviour
      • 2401.03 Animal communication
      • 2401.04 Animal cytology
      • 2401.05 Animal development
      • 2401.06 Animal ecology
      • 2401.07 Animal embryology
      • 2401.08 Animal genetics
      • 2401.09 Animal growth
      • 2401.10 Animal histology
      • 2401.11 Animal pathology
      • 2401.12 Animal parasitology
      • 2401.13 Animal physiology
      • 2401.14 Animal Taxonomy
      • 2401.15 General Zoology
      • 2401.16 Herpetology
      • 2401.17 Invertebrates
      • 2401.18 Mammology
      • 2401.19 Marine zoology
      • 2401.20 Ornithology
      • 2401.21 Primatology
      • 2401.22 Protozoology
      • 2401.23 Vertebrates
      • 2401.90 Zoology: letiology
      • 2401.91 Non-insect invertebrates
      • 2401.99 Other (specify)
    • 2402 Anthropology (physical)
      • 2402.01 Anthropological archives
      • 2402.02 Anthropological genetics
      • 2402.03 Anthropometry and forensic anthropology
      • 2402.04 Body composition
      • 2402.05 Body constitution
      • 2402.06 Ethnology
      • 2402.07 Medical anthropology
      • 2402.08 Nutritional habits
      • 2402.09 Osteology
      • 2402.10 Population biology
      • 2402.11 Primate behavior
      • 2402.12 Primate somatology
      • 2402.13 Racial biology
      • 2402.14 Somatic growth
      • 2402.15 Somatic ageing
      • 2402.99 Other (specify)
    • 2403 Biochemistry
    • 2404 Biomathematics
      • 2404.01 Biostatistics
      • 2404.99 Other (specify)
    • 2405 Biometrics
    • 2406 Biophysics
      • 2406.01 Bioacoustics
      • 2406.02 Bioelectricity
      • 2406.03 Bioenergetics
      • 2406.04 Bio-mechanics
      • 2406.05 Bio-optics
      • 2406.06 Medical physics
      • 2406.99 Other (specify)
    • 2407 Cell biology
      • 2407.01 Cell culture
      • 2407.02 Cell genetics
      • 2407.03 Cell morphology
      • 2407.04 Cytology
      • 2407.05 Tissueculture
      • 2407.90 Wall cell structure
      • 2407.99 Other (specify)
    • 2408 Ethology
      • 2408.01 Animal
      • 2408.02 Human
      • 2408.03 Insects
      • 2408.99 Other (specify)
    • 2409 Genetics
      • 2409.01 Embryology
      • 2409.02 Genetic engineering
      • 2409.03 Population genetics
      • 2409.90 Animal citogenetics
      • 2409.91 Genetic development
      • 2409.92 Plant molecular genetics
      • 2409.99 Other (specify)
    • 2410 Human biology
      • 2410.01 Blood groups
      • 2410.02 Human anatomy
      • 2410.03 Human cytology
      • 2410.04 Human development
      • 2410.05 Human ecology
      • 2410.06 Human embryology
      • 2410.07 Human genetics
      • 2410.08 Human histology
      • 2410.09 Human neuro-anatomy
      • 2410.10 Human physiology
      • 2410.11 Sensory organs
      • 2410.12 Systemic anatomy
      • 2410.13 Topographic anatomy
      • 2410.99 Other (specify)
    • 2411 Human physiology
      • 2411.01 Attitude physiology
      • 2411.02 Anesthesiology
      • 2411.03 Cardio-vascular physiology
      • 2411.04 Endocrine physiology
      • 2411.05 Enviromental physiology
      • 2411.06 Exercise physiology
      • 2411.07 Gastro-intestinal physiology
      • 2411.08 Human metabolisms
      • 2411.09 Human temperature regulation
      • 2411.10 Muscle physiology
      • 2411.11 Neurophysiology
      • 2411.12 Physiology of the central nervous system
      • 2411.13 Physiology of hearing
      • 2411.14 Physiology of speech
      • 2411.15 Physiology of vision
      • 2411.16 Reproduction physiology
      • 2411.17 Respiration physiology
      • 2411.18 Transport physiology
      • 2411.99 Other (specify)
    • 2412 Immunology
      • 2412.01 Antigens
      • 2412.02 Antibodies
      • 2412.03 Antigen-antibody reaction
      • 2412.04 Antibody formation
      • 2412.05 Hypersensitivity
      • 2412.06 Immunisation
      • 2412.07 Immunochemistry
      • 2412.08 Organ transplantation
      • 2412.09 Tissue antibodies
      • 2412.10 Vaccines
      • 2412.99 Other (specify)
    • 2413 Insect Biology (Entomology)
      • 2413.01 General entomology
      • 2413.02 Insect development
      • 2413.03 Insect ecology
      • 2413.04 Insect morphology
      • 2413.05 Insect physiology
      • 2413.06 Insect taxonomy
      • 2413.99 Other (specify)
    • 2414 Microbiology
      • 2414.01 Antibiotics
      • 2414.02 Bacterial physiology
      • 2414.03 bacterial metabolism
      • 2414.04 Bacteriology
      • 2414.05 Bacteriophage
      • 2414.06 Fungi
      • 2414.07 Microbial Metabolism
      • 2414.08 Microbial processes
      • 2414.09 Molds
      • 2414.10 Mycology (Yeast)
      • 2414.90 Microbiology: Vegetal residues degradation
      • 2414.99 Other (specify)
    • 2415 Molecular biology
      • 2415.01 Molecular biology of microorganisms
      • 2415.02 Plant Molecular Biology
    • 2416 Palaeontology
      • 2416.01 Animal palaentology
      • 2416.02 invertebrate paleontology
      • 2416.03 Palinology
      • 2416.04 Plant palaeontology
      • 2416.05 Vertebrate palaeontology
      • 2416.99 Other (specify)
    • 2417 Plant Biology (Botany)
      • 2417.01 Bryology
      • 2417.02 Dendrology
      • 2417.03 General botany
      • 2417.04 Limnology
      • 2417.05 Marine biology
      • 2417.06 Mycology (mushrooms)
      • 2417.07 Phycology
      • 2417.08 Phytobiology
      • 2417.09 Phytopathology
      • 2417.10 Paleobotany
      • 2417.11 Plant anatomy
      • 2417.12 Plant cytology
      • 2417.13 Plant ecology
      • 2417.14 Plant genetics
      • 2417.15 Development growth
      • 2417.16 Plant histology
      • 2417.17 Plant nutrition
      • 2417.18 Plant parasitology
      • 2417.19 Plant physiology
      • 2417.20 Plant taxonomy
      • 2417.21 Pteridology
      • 2417.90 Biological nutrient fixation and mobilization
      • 2417.91 Biological nitrogen fixation
      • 2417.92 Ripening physiology
      • 2417.99 Other (specify)
    • 2418 Radiobiology
    • 2419 Symbiosis
    • 2420 Virology
      • 2420.01 Arbor viruses
      • 2420.02 Bacteriophages
      • 2420.03 Dermatropic viruses
      • 2420.04 Enteric viruses
      • 2420.05 Neurotropic viruses
      • 2420.06 Pantropic viruses
      • 2420.07 Pox viruses
      • 2420.08 Respiratory viruses
      • 2420.09 Viscerotropic viruses
      • 2420.91 Animal virology
      • 2420.99 Other (specify)
    • 2490 Neurosciences
      • 2490.01 Neurophysiology
      • 2490.02 Neurochemistry
    • 2499 Other biological specialities
  • 25 Earth and Space Science
    • 2501 Atmospheric sciences
      • 2501.01 Aeronomy
      • 2501.02 Airglow
      • 2501.03 Air-sea interaction
      • 2501.04 Atmospheric acoustics
      • 2501.05 atmospheric chemistry
      • 2501.06 Atmospheric dynamics
      • 2501.07 Atmospheric electricity
      • 2501.08 Atmospheric optics
      • 2501.09 Atmospheric radioactivity
      • 2501.10 Atmospheric structure
      • 2501.11 atmospheric thermodynamics
      • 2501.12 Atmospheric turbulence
      • 2501.13 Aurora
      • 2501.14 Cloud physics
      • 2501.15 Cosmic rays
      • 2501.16 Dissemination (atmospheric)
      • 2501.17 Geomagnetic pulsations
      • 2501.18 Ionosphere
      • 2501.19 Magnetospheric particles
      • 2501.20 Magnetospheric waves
      • 2501.21 Numerical modelling
      • 2501.22 Precipitation physics
      • 2501.23 Radioactive transfer
      • 2501.24 Solar wind
      • 2501.99 Other (specify)
    • 2502 Climatology
      • 2502.01 Analytical climatology
      • 2502.02 Applied climatology
      • 2502.03 Bioclimatology
      • 2502.04 Microclimatology
      • 2502.05 Paleoclimatology
      • 2502.06 Physical climatology
      • 2502.07 Regional climatology
      • 2502.99 Other (specify)
    • 2503 Geochemistry
      • 2503.01 Cosmochemistry
      • 2503.02 Experimental petrology
      • 2503.03 Exploration geochemistry
      • 2503.04 Geochronology and radio isotope
      • 2503.05 High temperature geochemistry
      • 2503.06 Low temperatures geochemistry
      • 2503.07 Organic geochemistry
      • 2503.08 Stable isotopes
      • 2503.09 Trace elements distribution
      • 2503.99 Other (specify)
    • 2504 Geodesy
      • 2504.01 Geodesic astronomy
      • 2504.02 Geodesic cartography
      • 2504.03 Geodesic navigation
      • 2504.04 Geodesic photogrammetry
      • 2504.05 Geodetic surveying
      • 2504.06 Physical geodesy
      • 2504.07 Satellite geodesy
      • 2504.08 Theoretical geodesy
      • 2504.99 Other (specify)
    • 2505 Geography
      • 2505.01 Biogeography
      • 2505.02 Geographical cartography
      • 2505.03 Geography of natural resources
      • 2505.04 Land utilization
      • 2505.05 Location theory
      • 2505.06 Medical geography
      • 2505.07 Physical geography
      • 2505.08 Topographic geography
      • 2505.99 Other (specify)
    • 2506 Geology
      • 2506.01 Areal geology
      • 2506.02 Coal geologi
      • 2506.03 Engineering geology
      • 2506.04 Environmental geology
      • 2506.05 Geohydrology
      • 2506.06 Geological surveys
      • 2506.07 Geomorphology
      • 2506.08 Geothermal processes and energy
      • 2506.09 Glacial geology
      • 2506.10 Mineral deposits
      • 2506.11 Mineralogy
      • 2506.12 Petroleum geology
      • 2506.13 Petrology, igneous and metamorphic
      • 2506.14 Petrology, sedimentary
      • 2506.15 Photogeology
      • 2506.16 Remote sensing (geology)
      • 2506.17 Rock mechanisms
      • 2506.18 Sedimentology
      • 2506.19 Stratigraphy
      • 2506.20 Structural geology
      • 2506.21 Volcanology
      • 2506.22 Well log analysis
      • 2506.99 Other (specify)
    • 2507 Geophysics
      • 2507.01 Geomagnetism and magnetic explotarion
      • 2507.02 Gravity (earth) and gravity exploration
      • 2507.03 Heat flow (earth)
      • 2507.04 Paleomagnetism
      • 2507.05 Seismology and seismic exploration
      • 2507.06 Solid-earth and geophysics
      • 2507.07 Tectonics
      • 2507.99 Other (specify)
    • 2508 Hydrology
      • 2508.01 Erosion (water)
      • 2508.02 Evaporation
      • 2508.03 Glaciology
      • 2508.04 Groundwater
      • 2508.05 Hydrobiology
      • 2508.06 Hydrography
      • 2508.07 Ice
      • 2508.08 Limnology
      • 2508.09 Permafrost
      • 2508.10 Precipitation
      • 2508.11 Quality of water
      • 2508.12 Snow
      • 2508.13 Soil moisture
      • 2508.14 Surface waters
      • 2508.15 Transpiration
      • 2508.99 Other (specify)
    • 2509 Meteorology
      • 2509.01 Agricultural mMeteorology
      • 2509.02 Air pollution
      • 2509.03 Extended weather forecasting
      • 2509.04 Hydrometeorology
      • 2509.05 Industrial meteorology
      • 2509.06 Marine meteorology
      • 2509.07 Mesometeorología
      • 2509.08 Micrometeorology
      • 2509.09 Numerical weather prediction
      • 2509.10 Observation briefing (weather)
      • 2509.11 Operational forecasting (weather)
      • 2509.12 Polar meteorology
      • 2509.13 Radar meteorology
      • 2509.14 Radio meteorology
      • 2509.15 Rocket meteorology
      • 2509.16 Satellite meteorology
      • 2509.17 Synoptic meteorology
      • 2509.18 Tropical meteorology
      • 2509.19 Weather analysis
      • 2509.20 Weather modification
      • 2509.99 Other (specify)
    • 2510 Oceanography
      • 2510.01 Biological oceanography
      • 2510.02 Chemical oceanography
      • 2510.03 Descriptive oceanography
      • 2510.04 Marine botany
      • 2510.05 Marine zoology
      • 2510.06 Ocean-bottom processes
      • 2510.07 Physical oceanography
      • 2510.08 Sea-air interactions
      • 2510.09 Sea ice
      • 2510.10 Shore and near-shore processes
      • 2510.11 Underwater sounds
      • 2510.90 Marine Geology (oceanography)
      • 2510.91 Renewable resources (oceanography)
      • 2510.92 Marine aquaculture (oceanography)
      • 2510.99 Other (specify)
    • 2511 Soil Science
      • 2511.01 Soil biochemistry
      • 2511.02 Soil biology
      • 2511.03 soil cartography
      • 2511.04 Soil chemistry
      • 2511.05 Soil classification
      • 2511.06 Soil conservation
      • 2511.07 Soil engineering
      • 2511.08 Soil mechanics (agriculture)
      • 2511.09 Soil microbiology
      • 2511.10 Soil mineralogy
      • 2511.11 Soil morphology and genesis
      • 2511.12 Soil physics
      • 2511.99 Other (specify)
    • 2512 Space Sciences
      • 2512.01 Exobiology
      • 2512.02 Space medicine
      • 2512.03 Space physiology
      • 2512.99 Other (specify)
    • 2599 Other Earth, Space or Environmental specialities
  • 31 Agricultural Sciences
    • 3101 Agricultural chemistry
      • 3101.01 Dairy products
      • 3101.02 Fertilizer processing
      • 3101.03 Fertilizer utilization
      • 3101.04 Fish products
      • 3101.05 Fungicides
      • 3101.06 Herbicides
      • 3101.07 Insecticides
      • 3101.08 Non-food crop products
      • 3101.09 Pesticides
      • 3101.10 Plant growth regulators
      • 3101.99 Other (specify)
    • 3102 Agricultural engineering
      • 3102.01 Agricultural mechanics
      • 3102.02 Drainage
      • 3102.03 Farm construction
      • 3102.04 Farm equipment
      • 3102.05 Irrigation (ver 3305.19)
      • 3102.99 Other (specify)
    • 3103 Agronomy
      • 3103.01 Crop breeding
      • 3103.02 Crop hybridisation
      • 3103.03 Crop management
      • 3103.04 Crop protection
      • 3103.05 Cultural engineering
      • 3103.06 Field crops
      • 3103.07 Forage crops
      • 3103.08 Management for plant production
      • 3103.09 Ornamental crops
      • 3103.10 Pasture
      • 3103.11 Seeds
      • 3103.12 Soil behavior under alternative uses
      • 3103.13 Soil fertility
      • 3103.14 Turf
      • 3103.15 Weed control
      • 3103.90 Plant propagation
      • 3103.91 Combined water and fertilizer use (management)
      • 3103.99 Other (specify)
    • 3104 Animal husbandry
      • 3104.01 Apiculture
      • 3104.02 Bovine
      • 3104.03 Breeding
      • 3104.04 Care and management
      • 3104.05 Equine
      • 3104.06 Nutrition
      • 3104.07 Ovine
      • 3104.08 Porcine
      • 3104.09 Poultry farming
      • 3104.10 Products
      • 3104.11 Reproduction
      • 3104.12 Selection
      • 3104.13 Sericulture
      • 3104.90 Livestock production system
      • 3104.99 Other (specify)
    • 3105 Fish and wildlife
      • 3105.01 Controls
      • 3105.02 Fish farming
      • 3105.03 Fish finding
      • 3105.04 Fish preservation
      • 3105.05 Fish processing
      • 3105.06 Fishing mechanics
      • 3105.07 Food habits
      • 3105.08 Game
      • 3105.09 Habitat influences
      • 3105.10 Population dynamics
      • 3105.11 Propagation and management
      • 3105.12 Wild life conservation and management
      • 3105.99 Other (specify)
    • 3106 Forestry
      • 3106.01 Conservation
      • 3106.02 Cultural engineering
      • 3106.03 Erosion control
      • 3106.04 Management
      • 3106.05 Products
      • 3106.06 Protection
      • 3106.07 Range management
      • 3106.08 Sylviculture
      • 3106.09 Watershed management
      • 3106.99 Other (specify)
    • 3107 Horticulture
      • 3107.01 Breeding
      • 3107.02 Cultural engineering
      • 3107.03 Floriculture
      • 3107.04 Fruit
      • 3107.05 Hybridisation
      • 3107.06 Vegetables
      • 3107.99 Other (specify)
    • 3108 Phytopathology
      • 3108.01 Bacteria
      • 3108.02 Disease control, biological
      • 3108.03 Disease control, chemical
      • 3108.04 Disease control, enviromental
      • 3108.05 Fungi
      • 3108.06 Nematodes
      • 3108.07 Physiogenesis
      • 3108.08 Plant susceptibility, resistance
      • 3108.09 Viruses
      • 3108.99 Other (specify)
    • 3109 Veterinary sciences
      • 3109.01 Anatomy
      • 3109.02 Genetics
      • 3109.03 Immunology
      • 3109.04 Internal medicine
      • 3109.05 Microbiology
      • 3109.06 Nutrition
      • 3109.07 Pathology
      • 3109.08 Pharmacology
      • 3109.09 Physiology
      • 3109.10 Surgery
      • 3109.11 Virology
      • 3109.99 Other (specify)
    • 3199 Other agricultural specialities
  • 32 Medical Sciences
    • 3201 Clinical sciences
      • 3201.01 Cancerology
      • 3201.02 Clinical Genetics
      • 3201.03 clinical microbiology
      • 3201.04 Clinical pathology
      • 3201.05 Clinical psychology
      • 3201.06 Dermatology
      • 3201.07 Geriatrics
      • 3201.08 Gynaecology
      • 3201.09 Ophthalmology
      • 3201.10 Pediatrics
      • 3201.11 Radiology
      • 3201.12 Radiotherapy
      • 3201.13 Syphilography
      • 3201.99 Other (specify)
    • 3202 Epidemiology
    • 3203 Forensic medicine
    • 3204 Occupational medicine
      • 3204.01 Nuclear medicine
      • 3204.02 Occupational diseases
      • 3204.03 Occupational health
      • 3204.04 Rehabilitation (medical)
      • 3204.99 Other (specify)
    • 3205 Internal medicine
      • 3205.01 Cardiology
      • 3205.02 Endocrinology
      • 3205.03 Gastro-enterology
      • 3205.04 Haematology
      • 3205.05 Infectious diseases
      • 3205.06 Nephrology
      • 3205.07 Neurology
      • 3205.08 Pulmonary diseases
      • 3205.09 Rheumatology
      • 3205.99 Other (specify)
    • 3206 Nutrition sciences
      • 3206.01 Digestion
      • 3206.02 Energy metabolism
      • 3206.03 Natural toxicants
      • 3206.04 Food deficiencies
      • 3206.05 Food pathogens
      • 3206.06 Food requirements
      • 3206.07 Mineral elements in food
      • 3206.08 Nutrients
      • 3206.09 Nutrient values
      • 3206.10 Nutritional diseases
      • 3206.11 Toxicity of food
      • 3206.12 Trace elements in food
      • 3206.13 Vitamins
      • 3206.99 Other (specify)
    • 3207 Pathology
      • 3207.01 Allergies
      • 3207.02 Atherosclerosis
      • 3207.03 Carcinogenesis
      • 3207.04 Cardio-vascular pathology
      • 3207.05 Comparative pathology
      • 3207.06 Endotoxins
      • 3207.07 Experimental pathology
      • 3207.08 Haematology
      • 3207.09 Histopathology
      • 3207.10 Immunopathology
      • 3207.11 Neuropathology
      • 3207.12 Parasitology
      • 3207.13 Oncology
      • 3207.14 Osteopathology
      • 3207.15 Radiation pathology
      • 3207.16 Stress
      • 3207.17 Teratology (study of monsters)
      • 3207.18 Thrombosis
      • 3207.99 Other (specify)
    • 3208 Pharmacodynamics
      • 3208.01 Absorption of drugs
      • 3208.02 Action of drugs
      • 3208.03 Activation, multiple processes
      • 3208.04 Active locations, receptors
      • 3208.05 Catalysis, autocatalysis, inmunocatalysis
      • 3208.06 Chemotherapy
      • 3208.07 Interaction of antigens
      • 3208.08 Mechanisms of action of drugs
      • 3208.09 drug metabolic processes
      • 3208.99 Other (specify)
    • 3209 Pharmacology
      • 3209.01 Analysis of pharmaceuticals
      • 3209.02 Composition of drugs
      • 3209.03 Evaluation of drugs
      • 3209.04 Naturally occurring drugs
      • 3209.05 Pharmacognosy
      • 3209.06 Pharmacopoeas
      • 3209.07 Phytopharmaceuticals
      • 3209.08 Preparation of drugs
      • 3209.09 Psychopharmacology
      • 3209.10 Radiopharmaceuticals
      • 3209.11 Standardization of drugs
      • 3209.12 Synthetic drugs
      • 3209.99 Other (specify)
    • 3210 Preventive medicine
    • 3211 Psychiatry
    • 3212 Public health
    • 3213 Surgery
      • 3213.01 Abdominal surgery
      • 3213.02 Aesthetic surgery
      • 3213.03 Anaesthesiology
      • 3213.04 Bone surgery
      • 3213.05 Ear-nose-throat surgery
      • 3213.06 Experimental surgery
      • 3213.07 Heart surgery
      • 3213.08 Neurosurgery
      • 3213.09 Ocular surgery
      • 3213.10 Orthopaedic surgery
      • 3213.11 Physiotherapy
      • 3213.12 Proctology
      • 3213.13 Stomatology-orthodonty
      • 3213.14 Transplantation surgery
      • 3213.15 Traumatology
      • 3213.16 Urology
      • 3213.17 Vascular surgery
      • 3213.99 Other (specify)
    • 3214 Toxicology
    • 3299 Other medical specialities
  • 33 Technological Sciences
    • 3301 Aeronautical technology and engineering
      • 3301.01 Aerodynamics
      • 3301.02 Aerodynamic loads
      • 3301.03 Aerodynamic theory
      • 3301.04 Aircraft
      • 3301.05 aviation fuels, combustion
      • 3301.06 Aircraft structures
      • 3301.07 Air cushion devices
      • 3301.08 Airports and air transport
      • 3301.09 Compressors and turbines
      • 3301.10 Flight tests and research
      • 3301.11 Flutter and vibration
      • 3301.12 Hydrodynamics
      • 3301.13 Instrumentation (aviation)
      • 3301.14 Landing loads
      • 3301.15 Propulsion systems
      • 3301.16 Propulsion system materials
      • 3301.17 Rotary wing
      • 3301.18 Stability and control
      • 3301.99 Other (specify)
    • 3302 Biochemical technology
      • 3302.01 Antibiotics technology
      • 3302.02 Fermentation technology
      • 3302.03 Industrial microbiology
      • 3302.90 Biochemical engineering
      • 3302.99 Other (specify)
    • 3303 Chemical technology and engineering
      • 3303.01 Catalysis technology
      • 3303.02 Chemical economics
      • 3303.03 Chemical processes
      • 3303.04 Chemical separation
      • 3303.05 Chemical synthesis
      • 3303.06 Combustion technology
      • 3303.07 Corrosion technology
      • 3303.08 Deionization
      • 3303.09 Electrochemical operations
      • 3303.10 Electroplating
      • 3303.11 Industrial chemistry
      • 3303.12 Nuclear-chemical processes
      • 3303.13 Preservation technology
      • 3303.14 Protective coatings
      • 3303.15 Refractory coating
      • 3303.16 Water repellent coatings
      • 3303.90 Technology Chemical Surfactants
      • 3303.99 Other (specify)
    • 3304 Computer technology
      • 3304.01 Analog computers
      • 3304.02 analog-digital converters
      • 3304.03 Arithmetic and machine instructions
      • 3304.04 Central processing units
      • 3304.05 Character recognition systems
      • 3304.06 Computer architecture
      • 3304.07 Computer peripherals
      • 3304.08 Computer reliability
      • 3304.09 Computer serviceability
      • 3304.10 Computer terminals, graphic display devices and plotters
      • 3304.11 Computing systems design
      • 3304.12 Control devices
      • 3304.13 Data transmission devices
      • 3304.14 Digital computers
      • 3304.15 Hybrid computers
      • 3304.16 Logical design
      • 3304.17 Real-time systems
      • 3304.18 Storage devices
      • 3304.99 Other (specify)
    • 3305 Construction technology
      • 3305.01 Architectural design
      • 3305.02 Airports construction
      • 3305.03 Buildings, large and skyscrapers
      • 3305.04 Bridges
      • 3305.05 Concrete (technology of)
      • 3305.06 Civil engineering
      • 3305.07 Dams
      • 3305.08 Drainage
      • 3305.09 Excavations
      • 3305.10 Foundations
      • 3305.11 Harbours
      • 3305.12 Heavy constructions
      • 3305.13 Highways
      • 3305.14 Houses
      • 3305.15 Hydraulic engineering
      • 3305.16 Hyperstatic systems
      • 3305.17 Industrial and commercial buildings
      • 3305.18 Inland waterways
      • 3305.19 Irrigation
      • 3305.20 Light constructions
      • 3305.21 Metallic constructions
      • 3305.22 Metrology of building
      • 3305.23 Organization of works
      • 3305.24 Prefabricated constructions
      • 3305.25 Prefabricated concrete
      • 3305.26 Public buildings
      • 3305.27 Railway construction
      • 3305.28 Regulations, codes and specifications
      • 3305.29 Road construction
      • 3305.30 Sewers and water purification
      • 3305.31 Soil mechanics (construction)
      • 3305.32 Structural engineering
      • 3305.33 Structural strength
      • 3305.34 Topography of building
      • 3305.35 Tunnels
      • 3305.36 Underground works
      • 3305.37 Urban planning
      • 3305.38 Water supply
      • 3305.39 Wood constructions
      • 3305.90 Heat transfer in building
      • 3305.99 Other (specify)
    • 3306 Electrical technology and engineering
      • 3306.01 Direct current power utilization
      • 3306.02 Electrical applications
      • 3306.03 Electric motors
      • 3306.04 Electric lighting
      • 3306.05 Insulated conductors
      • 3306.06 Manufacture of electrical equipment
      • 3306.07 Rotating machinery
      • 3306.08 Switchgear
      • 3306.09 Transmission and distribution
      • 3306.99 Other (specify)
    • 3307 Electronic technology
      • 3307.01 Antennae
      • 3307.02 Audio-electronics
      • 3307.03 Circuit design
      • 3307.04 Electro-acoustic transducers
      • 3307.05 Electron tubes
      • 3307.06 Filter design
      • 3307.07 Laser devices
      • 3307.08 Microwave devices
      • 3307.09 Photo-electric devices
      • 3307.10 Radar
      • 3307.11 Radio receivers
      • 3307.12 Radio transmitters
      • 3307.13 Recording devices
      • 3307.14 Semi-conductor devices
      • 3307.15 Sonar devices
      • 3307.16 Sonic devices
      • 3307.17 Thermo-electric devices
      • 3307.18 Thermo-ionic devices
      • 3307.19 Transistors
      • 3307.20 TV emitters (transmitters)
      • 3307.21 TV receivers (See 3325.09)
      • 3307.22 Ultrasonic devices
      • 3307.23 X-ray devices
      • 3307.90 Microelectronics
      • 3307.91 Microelectronics: Silicon Technology
      • 3307.92 Microelectronics: III-V Technologies and alternatives
      • 3307.93 Microelectronics: Design
      • 3307.99 Other (specify)
    • 3308 Environmental technology and engineering
      • 3308.01 Air pollution control
      • 3308.02 industrial wastes
      • 3308.03 Insect control technology
      • 3308.04 Pollution engineering
      • 3308.05 Radio active waste disposal
      • 3308.06 Reclamation of water
      • 3308.07 Refuse disposal
      • 3308.08 Rodent control technology
      • 3308.09 Sanitary engineering
      • 3308.10 Sewage technology
      • 3308.11 Water pollution control
      • 3308.99 Other (specify)
    • 3309 Food technology
      • 3309.01 Alcoholic beverages
      • 3309.02 Animal feed
      • 3309.03 Antioxidants in food
      • 3309.04 Bakery
      • 3309.05 Brewing
      • 3309.06 Canning
      • 3309.07 Cereal products
      • 3309.08 Colours
      • 3309.09 Dairy products
      • 3309.10 Flavour
      • 3309.11 Flour milling
      • 3309.12 Food additives
      • 3309.13 Food preservation
      • 3309.14 Food processing
      • 3309.15 Food sanitation
      • 3309.16 Freeze-drying
      • 3309.17 Lyophilization
      • 3309.18 Non-alcoholic beverages
      • 3309.19 Pasteurization
      • 3309.20 Properties of food
      • 3309.21 Protein foods
      • 3309.22 Refrigeration
      • 3309.23 Stabilisers
      • 3309.24 Starch
      • 3309.25 Sterilisation of food
      • 3309.26 Sugar
      • 3309.27 Synthetic foods
      • 3309.28 Vegetable oils and fats
      • 3309.29 Wine
      • 3309.90 Microbiology of food
      • 3309.91 Keeping postharvest
      • 3309.92 Biochemistry and microbiology of fermentation processes
      • 3309.93 Canned vegetables
      • 3309.95 Food technology: Heat transfer
      • 3309.99 Other (specify)
    • 3310 Industrial technology
      • 3310.01 Industrial equipment
      • 3310.02 Industrial machinery
      • 3310.03 Industrial processes
      • 3310.04 Maintenance engineering
      • 3310.05 Processing engineering
      • 3310.06 Process specifications
      • 3310.07 Time and motion study
      • 3310.99 Other (specify)
    • 3311 Instrumentation technology
      • 3311.01 Automation technology
      • 3311.02 Control engineering
      • 3311.03 Dental instruments
      • 3311.04 Electro-optical devices
      • 3311.05 Electrical test equipment
      • 3311.06 Electrical instruments
      • 3311.07 Electronic instruments
      • 3311.08 Laboratory equipment
      • 3311.09 Lenses
      • 3311.10 Medical instruments
      • 3311.11 Optical instruments
      • 3311.12 Photographic and cinematographic equipment
      • 3311.13 Scientific apparatus
      • 3311.14 Servomechanisms
      • 3311.15 Telechiric techniques
      • 3311.16 Temperature measurement instruments
      • 3311.17 Test equipment
      • 3311.18 Thermo static instruments
      • 3311.19 Timing Devices
      • 3311.99 Other (specify)
    • 3312 Materials technology
      • 3312.01 Abrasives
      • 3312.02 Binders
      • 3312.03 Ceramics
      • 3312.04 Cermets
      • 3312.05 Clay products
      • 3312.06 Glass
      • 3312.07 Limes
      • 3312.08 Material properties
      • 3312.09 Material resistance
      • 3312.10 Plastics
      • 3312.11 Refractories
      • 3312.12 Testing of materials
      • 3312.13 Wood technology
      • 3312.99 Other (specify)
    • 3313 Mechanical Engineering and technology
      • 3313.01 Air blowers
      • 3313.02 Air compressors
      • 3313.03 Bearings
      • 3313.04 Construction equipment
      • 3313.05 Dies, jigs and patterns
      • 3313.06 Farm machinery
      • 3313.07 Food machinery
      • 3313.08 Gas engines
      • 3313.09 Gears
      • 3313.10 Heating equipment
      • 3313.11 Hydraulic machinery
      • 3313.12 Industrial machinery and equipment
      • 3313.13 Internal combustion engines (general)
      • 3313.14 Machine tools and accessories
      • 3313.15 Machine design
      • 3313.16 Materials handling equipment
      • 3313.17 Mechanized operations
      • 3313.18 Mining machinery
      • 3313.19 Nuclear machinery
      • 3313.20 Papermaking machinery
      • 3313.21 Petrleum extracting machinery
      • 3313.22 Pneumatic equipment
      • 3313.23 Power transmission equipment (mechanical)
      • 3313.24 Printing and duplicating machinery
      • 3313.25 Pumps and liquid handling equipment
      • 3313.26 Refrigerating equipment
      • 3313.27 specialized industrial machinery
      • 3313.28 Steam engines
      • 3313.29 Textile machinery
      • 3313.30 Turbines
      • 3313.31 Vending and service machinery
      • 3313.99 Other (specify)
    • 3314 Medical technology
      • 3314.01 Artificial organs
      • 3314.02 Prosthetic devices
      • 3314.99 Other (specify)
    • 3315 Metallurgical technology
      • 3315.01 Aluminum
      • 3315.02 Copper
      • 3315.03 Electrometallurgical products
      • 3315.04 Foundries (general)
      • 3315.05 Iron and steel mills, foundries and forges
      • 3315.06 Lead and zinc
      • 3315.07 Metallurgical products (special)
      • 3315.08 Metallurgical Services
      • 3315.09 Non-ferrous smelting, refining and processing
      • 3315.10 Non-ferrous castings
      • 3315.11 Powder metallurgy
      • 3315.12 Precious metals
      • 3315.13 Precision casting
      • 3315.14 Radioactive metals
      • 3315.15 Rare metals
      • 3315.16 Refining, including zone refining
      • 3315.17 Refractory metals
      • 3315.90 Non-ferrous extractive metallurgy
      • 3315.99 Other (specify)
    • 3316 Metal products technology
      • 3316.01 autoclaves and boilers
      • 3316.02 Cans and containers
      • 3316.03 Distilling equipment
      • 3316.04 Electroplated and coated products
      • 3316.05 Furnaces, ovens, kilns
      • 3316.06 Hardware
      • 3316.07 Machined, and turned products
      • 3316.08 Metal fabrication services
      • 3316.09 Pipes, fittings and valves
      • 3316.10 Pressure vessels
      • 3316.11 sheet metal products
      • 3316.12 Stampings
      • 3316.13 Structural steel products
      • 3316.14 Weldings
      • 3316.15 Wire products
      • 3316.99 Other (specify)
    • 3317 Motor vehicle technology
      • 3317.01 All terrain vehicles
      • 3317.02 Automobiles
      • 3317.03 Buses, lorries and trailers
      • 3317.04 Diesel engines
      • 3317.05 Motor cycles
      • 3317.06 Motor transport services
      • 3317.07 Parts and accessories
      • 3317.08 Piston engines
      • 3317.09 Rotating engines
      • 3317.10 Traffic engineering
      • 3317.99 Other (specify)
    • 3318 Mining technology
      • 3318.01 Coal minning
      • 3318.02 Concentration of ores
      • 3318.03 Iron ores
      • 3318.04 Mining services
      • 3318.05 Non-ferrous metal ores
      • 3318.06 Non-metallic minerals
      • 3318.07 Quarry products
      • 3318.08 Sulphur
      • 3318.09 Uranium and radioactive ores
      • 3318.99 Other (specify)
    • 3319 Naval technology
      • 3319.01 Air cushion devices
      • 3319.02 Boats
      • 3319.03 Inland waterway craft
      • 3319.04 Marine auxiliaries
      • 3319.05 Marine engines
      • 3319.06 Marine transportation
      • 3319.07 Merchant ships
      • 3319.08 Naval architecture
      • 3319.09 Ocean transport
      • 3319.10 Propellers
      • 3319.11 Shafting
      • 3319.12 Shipbuilding
      • 3319.13 Underwater craft
      • 3319.99 Other (specify)
    • 3320 Nuclear technology
      • 3320.01 Isotope applications
      • 3320.02 Isotope separation
      • 3320.03 Nuclear explosions
      • 3320.04 Nuclear fission reactors
      • 3320.05 Nuclear fusion reactors
      • 3320.06 Nuclear tests
      • 3320.99 Other (specify)
    • 3321 Petroleum and coal technology
      • 3321.01 Asphaltic materials
      • 3321.02 Coal chemicals
      • 3321.03 Crude petroleum
      • 3321.04 Gas pipelines
      • 3321.05 Liquefied gas
      • 3321.06 Lubricating oil and grease
      • 3321.07 Natural Gas
      • 3321.08 Oilfield equipment
      • 3321.09 Oilfield services
      • 3321.10 Oil pipelines
      • 3321.11 Petrochemicals
      • 3321.12 Petroleum products: petrol, oils, waxes
      • 3321.13 Refinery’s Design
      • 3321.14 Storage (oil and gas)
      • 3321.90 Coals characterization
      • 3321.99 Other (specify)
    • 3322 Power technology
      • 3322.01 Power distribution
      • 3322.02 Power generation
      • 3322.03 Power generators
      • 3322.04 Power transmission
      • 3322.05 unconventional sources of energy
      • 3322.99 Other (specify)
    • 3323 Railway technology
      • 3323.01 Locomotives
      • 3323.02 Railroad equipment
      • 3323.03 Railway services
      • 3323.04 Rapid transit
      • 3323.05 Rolling stock
      • 3323.99 Other (specify)
    • 3324 Space technology
      • 3324.01 Artificial satellites
      • 3324.02 Missiles: launching and recovery
      • 3324.03 Missile facilities
      • 3324.04 Rocket engines
      • 3324.05 Space craft
      • 3324.06 Space tracking
      • 3324.07 Vehicle control
      • 3324.99 Other (specify)
    • 3325 Telecommunications technology
      • 3325.01 Broadcasting, sound and television
      • 3325.02 Cable television
      • 3325.03 Cinematography
      • 3325.04 Microwave links
      • 3325.05 Radiocommunications
      • 3325.06 Satellite communications
      • 3325.07 Telegraph
      • 3325.08 Telephone
      • 3325.09 Television
      • 3325.99 Other (specify)
    • 3326 Textile technology
      • 3326.01 Cotton
      • 3326.02 Flax
      • 3326.03 Jute
      • 3326.04 Spinning
      • 3326.05 Synthetic textiles
      • 3326.06 Weaving
      • 3326.07 Wool
      • 3326.99 Other (specify)
    • 3327 Transportation systems technology
      • 3327.01 Airlines operations, air-traffic control
      • 3327.02 Traffic analysis
      • 3327.03 Urban Transit systems
      • 3327.04 Combinations of systems
      • 3327.99 Other (specify)
    • 3328 Unit operations technology
      • 3328.01 Absorption
      • 3328.02 Agitation
      • 3328.03 Centrifugation
      • 3328.04 Compressing
      • 3328.05 Crystallisation
      • 3328.06 Deionisation
      • 3328.07 Distillation and condensation
      • 3328.08 Drying
      • 3328.09 Evaporation
      • 3328.10 Filtration
      • 3328.11 Flotation
      • 3328.12 Flow through porous media
      • 3328.13 Fluidization of solids
      • 3328.14 Freeze-drying
      • 3328.15 Handling of solids
      • 3328.16 Heat transfer
      • 3328.17 Liquid-liquid extraction
      • 3328.18 Mass Transfer
      • 3328.19 Mixing
      • 3328.20 Pipes, fittings and valves
      • 3328.21 Pumping
      • 3328.22 Screening
      • 3328.23 Sedimentation
      • 3328.24 Size-reduction
      • 3328.25 Solid-liquid extraction
      • 3328.26 Refrigeration
      • 3328.27 Vapor-liquid transfer
      • 3328.99 Other (specify)
    • 3329 Urban Planning
      • 3329.01 Building Codes
      • 3329.02 Communications
      • 3329.03 Community organization
      • 3329.04 Land Use
      • 3329.05 Regional development
      • 3329.06 Sanitary services
      • 3329.07 Transportation
      • 3329.08 Urban environment
      • 3329.09 Urban-ural relations
      • 3329.99 Other (specify)
    • 3399 Other technological specialities
  • 51 Anthropology
    • 5101 Cultural anthropology
      • 5101.01 Adornment
      • 5101.02 Clothing
      • 5101.03 Dances, feasts
      • 5101.04 Ethno-musicology
      • 5101.05 Ethnolinguistics
      • 5101.06 Museology
      • 5101.07 Myths
      • 5101.08 Magic
      • 5101.09 Poems, stories
      • 5101.10 Religion
      • 5101.11 Sorcery
      • 5101.12 Symbolism
      • 5101.13 Traditional medicine
      • 5101.14 Tradition
      • 5101.99 Other (specify)
    • 5102 Ethnography and Ethnology
      • 5102.01 Agriculture
      • 5102.02 Arms
      • 5102.03 Barter
      • 5102.04 Exchange
      • 5102.05 Habitat
      • 5102.06 Handicraft
      • 5102.07 Hunting
      • 5102.08 Fishing
      • 5102.09 Foraging
      • 5102.10 Metallurgy
      • 5102.11 Stockraising
      • 5102.99 Other (specify)
    • 5103 Social anthropology
      • 5103.01 Chiefdom, royalty
      • 5103.02 Descent, family, kinship
      • 5103.03 Nomadism
      • 5103.04 Slavery, bondage
      • 5103.05 War
      • 5103.99 Other (specify)
    • 5199 Other anthropology specialities
  • 52 Demography
    • 5201 Fertility
      • 5201.01 Birth rate
      • 5201.02 General fertility
      • 5201.03 Illegitimacy
      • 5201.04 Marriages rate
      • 5201.05 Sterility and fecundity
      • 5201.99 Other (specify)
    • 5202 General demography
      • 5202.01 Methodology of research
      • 5202.02 Methodology of analysis
      • 5202.03 Theory
      • 5202.99 Other (specify)
    • 5203 Geographical demography
      • 5203.01 Internal mobility and migrations
      • 5203.02 International mobility and migrations
      • 5203.03 Local Demography
      • 5203.04 Regional Demography
      • 5203.05 Rural Demography
      • 5203.06 Urban Demography
      • 5203.99 Other (specify)
    • 5204 Historical demography
      • 5204.01 Fertility and marriage rate
      • 5204.02 Methodological aspects
      • 5204.03 Migration
      • 5204.04 Mortality
      • 5204.05 Sources of observation
      • 5204.06 Theoretical aspects
      • 5204.99 Other (specify)
    • 5205 Mortality
      • 5205.01 Causes of mortality
      • 5205.02 General mortality
      • 5205.03 Infant mortality
      • 5205.04 prenatal and perinatal mortality
      • 5205.05 Related variables
      • 5205.99 Other (specify)
    • 5206 Population characteristics
      • 5206.01 Active population
      • 5206.02 Age distribution
      • 5206.03 Ageing of the population
      • 5206.04 Biological characteristics
      • 5206.05 Epidemiological characteristics
      • 5206.06 General demographic structures
      • 5206.07 Morbidity
      • 5206.08 Population genetics
      • 5206.09 Sex
      • 5206.10 Socio-economic characteristics
      • 5206.99 Other (specify)
    • 5207 Population size and demographic evolution
      • 5207.01 Computational demography
      • 5207.02 Demographic transition
      • 5207.03 Demographic analysis
      • 5207.04 Population censuses and other data collection
      • 5207.05 Population estimates
      • 5207.06 Population forecasts
      • 5207.07 Population growth
      • 5207.08 Population models
      • 5207.09 Population projections
      • 5207.10 Statistics of population
      • 5207.99 Other (specify)
    • 5299 Other demographic specialities
  • 53 Economic Sciences
    • 5301 Domestic fiscal policy and public finance
      • 5301.01 Fiscal policy and public debt
      • 5301.02 Public finance (budget)
      • 5301.99 Other (specify)
    • 5302 Econometrics
      • 5302.01 Economic indicators
      • 5302.02 Econometric models
      • 5302.03 Economic projection
      • 5302.04 Economic statistics
      • 5302.05 Economic time-series
      • 5302.99 Other (specify)
    • 5303 Economic accounting
      • 5303.01 Financial accounts
      • 5303.02 National wealth and balance sheets
      • 5303.03 National income accounting
      • 5303.04 Input-output
      • 5303.05 Social accounts
      • 5303.99 Other (specify)
    • 5304 Economic activity
      • 5304.01 Consumption, savings, investment
      • 5304.02 Distribution
      • 5304.03 Domestic trade
      • 5304.04 Foreign trade
      • 5304.05 Insurance
      • 5304.06 Money and banking
      • 5304.07 Production
      • 5304.08 Re-distribution
      • 5304.99 Other (specify)
    • 5305 Economic systems
      • 5305.01 Capitalist economic systems
      • 5305.02 Collectivist economic systems
      • 5305.03 Comparative economic systems
      • 5305.04 Socialist economic systems
      • 5305.99 Other (specify)
    • 5306 Economics of technological change
      • 5306.01 Economics of research and experimental development
      • 5306.02 Technological innovation
      • 5306.03 Transfer of technology
      • 5306.99 Other (specify)
    • 5307 Economic theory
      • 5307.01 Capital formation
      • 5307.02 Credit theory
      • 5307.03 Economic development models and theories
      • 5307.04 Economic development studies
      • 5307.05 Economic equilibrium
      • 5307.06 Economic fluctuations
      • 5307.07 economic forecasting
      • 5307.08 Economic growth theory
      • 5307.09 Economic planning theory
      • 5307.10 Employment theory and models
      • 5307.11 Fiscal theory
      • 5307.12 International trade theory
      • 5307.13 Investment theory
      • 5307.14 Macro-economic Theory
      • 5307.15 Micro-economic Theory
      • 5307.16 Monetary theory
      • 5307.17 Savings theory
      • 5307.18 Stabilization theories
      • 5307.19 Welfare theory
      • 5307.99 Other (specify)
    • 5308 General economics
      • 5308.01 Economic methodology
      • 5308.02 Consumer Behavior
      • 5308.03 History of economic thought
      • 5308.99 Other (specify)
    • 5309 Industrial organization and public policy
      • 5309.01 Economic concentration
      • 5309.02 Economic integration
      • 5309.03 Government regulation of the private sector
      • 5309.04 Market structure
      • 5309.05 Monopoly and competition
      • 5309.06 Public enterprises
      • 5309.07 Public utilities
      • 5309.99 Other (specify)
    • 5310 International economics
      • 5310.01 Balance of payments
      • 5310.02 Foreign aid
      • 5310.03 International aid
      • 5310.04 International business
      • 5310.05 International economic policy
      • 5310.06 International Finance
      • 5310.07 International investment
      • 5310.08 International monetary arrangements
      • 5310.09 International trade relations
      • 5310.90 International economy: American area
      • 5310.91 International economy: European area
      • 5310.99 Other (specify)
    • 5311 Organization and management of enterprises
      • 5311.01 Advertising
      • 5311.02 Financial management
      • 5311.03 Industry Studies
      • 5311.04 Manpower management
      • 5311.05 Marketing
      • 5311.06 Market studies
      • 5311.07 Operations research
      • 5311.08 Optimum production levels
      • 5311.09 Organization of production
      • 5311.10 Sales management
      • 5311.99 Other (specify)
    • 5312 Sectorial economics
      • 5312.01 Agriculture, forestry, fishing
      • 5312.02 Community, social and personal services
      • 5312.03 Construction
      • 5312.04 Education
      • 5312.05 Energy
      • 5312.06 Finance and insurance
      • 5312.07 Health
      • 5312.08 Manufacturing
      • 5312.09 Mining
      • 5312.10 Research and development
      • 5312.11 Trade and commerce
      • 5312.12 Transport and communications
      • 5312.90 Tourism
      • 5312.99 Other (specify)
    • 5399 Other economic specialities
  • 54 Geography
    • 5401 Economic geography
      • 5401.01 Distribution of natural resources
      • 5401.02 Geography of economic activities
      • 5401.03 Land utilisation
      • 5401.04 Regional development
      • 5401.99 Other (specify)
    • 5402 Historical geography
    • 5403 Human geography
      • 5403.01 Cultural geography
      • 5403.02 Demo-geography
      • 5403.03 Linguistic geography
      • 5403.04 Geography of religion
      • 5403.05 Political geography
      • 5403.06 Social geography
      • 5403.99 Other (specify)
    • 5404 Regional geography
      • 5404.01 Urban geography
      • 5404.02 Rural geography
      • 5404.99 Other (specify)
    • 5499 Other geographical specialities
  • 55 History
    • 5501 Biographies
    • 5502 General history
      • 5502.01 Comparative History
      • 5502.02 Historiography
      • 5502.03 Historical monographs
      • 5502.04 Theories and methods
      • 5502.99 Other (specify)
    • 5503 History of countries
      • 5503.01 Local history
      • 5503.02 Regional history
      • 5503.99 Other (specify)
    • 5504 History by epochs
      • 5504.01 Ancient history
      • 5504.02 Contemporary history
      • 5504.03 Medieval history
      • 5504.04 Modern history
      • 5504.05 Prehistory
      • 5504.99 Other (specify)
    • 5505 Sciences auxiliary to history
      • 5505.01 Archaeology
      • 5505.02 Ceramology
      • 5505.03 Epigraphy
      • 5505.04 Heraldry
      • 5505.05 Iconography
      • 5505.06 Numismatics
      • 5505.07 Onomastics
      • 5505.08 Paleography
      • 5505.09 Papyrology
      • 5505.10 Philology
      • 5505.11 Sigillography
      • 5505.12 Stratigraphy
      • 5505.99 Other (specify)
    • 5506 Specialized histories
      • 5506.01 History of architecture
      • 5506.02 History of art
      • 5506.03 History of astronomy
      • 5506.04 History of biology
      • 5506.05 History of chemistry
      • 5506.06 History of economics
      • 5506.07 History of education
      • 5506.08 History of geography
      • 5506.09 History of geology
      • 5506.10 History of international relations
      • 5506.11 History of journalism
      • 5506.12 History of law and legal institutions
      • 5506.13 History of Literature
      • 5506.14 History of linguistics
      • 5506.15 History of logic
      • 5506.16 History of the magistrature
      • 5506.17 History of medicine
      • 5506.18 History of philosophy
      • 5506.19 History of physics
      • 5506.20 History of political ideas
      • 5506.21 History of religions
      • 5506.22 History of science
      • 5506.23 History of sociology
      • 5506.24 History of technology
      • 5506.25 History of war
      • 5506.90 History of botany
      • 5506.99 Other (specify)
    • 5599 Other historical specialities
  • 56 Juridical Science and Law
    • 5601 Canon law
    • 5602 General theory and method
      • 5602.01 Common law
      • 5602.02 Comparative law
      • 5602.03 Jurisprudence
      • 5602.04 Law of antiquity
      • 5602.05 Natural law
      • 5602.06 Statute law
      • 5602.99 Other (specify)
    • 5603 International law
      • 5603.01 Aviation law
      • 5603.02 Maritime law
      • 5603.03 Outer-space law
      • 5603.04 Sea-bed law
      • 5603.99 Other (specify)
    • 5604 Legal organization
      • 5604.01 Court officials and procedures
      • 5604.02 Magistrature
      • 5604.03 Tribunals
      • 5604.99 Other (specify)
    • 5605 National law and legislation
      • 5605.01 Administrative law
      • 5605.02 Civil law
      • 5605.03 Commercial law
      • 5605.04 Constitutional law
      • 5605.05 Criminal law
      • 5605.06 Fiscal law
      • 5605.07 Public legislation
      • 5605.08 Private law
      • 5605.99 Other (specify)
    • 5699 Other juridical specialities
  • 57 Linguistics
    • 5701 Applied linguistics
      • 5701.01 Abstracting
      • 5701.02 Automated documentation
      • 5701.03 Bilingualism
      • 5701.04 Computational linguistics
      • 5701.05 Documentary languages
      • 5701.06 Documentation
      • 5701.07 Language and literature
      • 5701.08 Language of children
      • 5701.09 Machine translation
      • 5701.10 Speech pathology and correction
      • 5701.11 Teaching of languages
      • 5701.12 Translation
      • 5701.99 Other (specify)
    • 5702 Diachronic linguistics
      • 5702.01 Historical linguistics
      • 5702.02 Etymology
      • 5702.99 Other (specify)
    • 5703 Linguistic geography
    • 5704 Linguistic theory
    • 5705 Synchronic linguistics
      • 5705.01 Comparative linguistics
      • 5705.02 Ethnolinguistics
      • 5705.03 Lexicography
      • 5705.04 Lexicology
      • 5705.05 Phonetics
      • 5705.06 Phonology
      • 5705.07 Psycholinguistics
      • 5705.08 Semantics
      • 5705.09 Semiology
      • 5705.10 Sociolinguistics
      • 5705.11 Spelling
      • 5705.12 Stylistics (style and rhetoric)
      • 5705.13 Syntax, syntactic analysis
      • 5705.99 Other (specify)
    • 5799 Other linguistic specialities
  • 58 Pedagogy
    • 5801 Educational theory and methods
      • 5801.01 Audio-visual methods
      • 5801.02 Comparative pedagogy
      • 5801.03 Curriculum development
      • 5801.04 Educational theories
      • 5801.05 Experimental pedagogy
      • 5801.06 Pupil and student assessment
      • 5801.07 Pedagogical methods
      • 5801.08 Programmed instruction
      • 5801.99 Other (specify)
    • 5802 Organization and planning of education
      • 5802.01 Adult Education
      • 5802.02 Educational institutions; organization and management
      • 5802.03 Educational planning and financing
      • 5802.04 Levels and subjects of education
      • 5802.05 Special Education: handicapped, mentally retarded
      • 5802.06 Statistical analysis, modelling and projection
      • 5802.07 Vocational education and training
      • 5802.99 Other (specify)
    • 5803 Teacher training and employment
      • 5803.01 Career and status of teachers
      • 5803.02 Training of teachers
      • 5803.99 Other (specify)
    • 5899 Other pedagogical specialities
  • 59 Political Science
    • 5901 International relations
      • 5901.01 International co-operation
      • 5901.02 International organizations
      • 5901.03 International politics
      • 5901.04 International treaties and agreements
      • 5901.05 Problems of international relations
      • 5901.99 Other (specify)
    • 5902 Policy sciences
      • 5902.01 Agricultural policy
      • 5902.02 Cultural policy
      • 5902.03 Commercial policy
      • 5902.04 Communications policy
      • 5902.05 Demographic policy
      • 5902.06 Economic policy
      • 5902.07 Educational policy
      • 5902.08 Environmental policy
      • 5902.09 Foreign policy
      • 5902.10 Health policy
      • 5902.11 Industrial policy
      • 5902.12 Information policy
      • 5902.13 Policy planning
      • 5902.14 Science and technology policy
      • 5902.15 Social policy
      • 5902.16 Transport policy
      • 5902.99 Other (specify)
    • 5903 Political ideologies
    • 5904 Political institutions
      • 5904.01 Executive power
      • 5904.02 Judiciary power
      • 5904.03 Legislative power
      • 5904.04 Relations between the powers
      • 5904.99 Other (specify)
    • 5905 Political life
      • 5905.01 Elections
      • 5905.02 Political behavior
      • 5905.03 political groups
      • 5905.04 Political leadership
      • 5905.05 political movements
      • 5905.06 Political parties
      • 5905.99 Other (specify)
    • 5906 Political sociology
      • 5906.01 Human rights
      • 5906.02 Languages
      • 5906.03 Minorities
      • 5906.04 Race
      • 5906.05 Religion
      • 5906.06 Social conflicts
      • 5906.99 Other (specify)
    • 5907 Political systems
      • 5907.90 Political systems: American Area
    • 5908 Political theory
    • 5909 Public administration
      • 5909.01 Administrative management
      • 5909.02 Central institutions
      • 5909.03 Civil service
      • 5909.04 Public services
      • 5909.05 Regional institutions
      • 5909.99 Other (specify)
    • 5910 Public opinion
      • 5910.01 Information
      • 5910.02 Mass media
      • 5910.03 Press
      • 5910.04 Propaganda
      • 5910.99 Other (specify)
    • 5999 Other political science specialities
  • 61 Psychology
    • 6101 Abnormal psychology
      • 6101.01 Behaviour disorders
      • 6101.02 Deviant behavior
      • 6101.03 Mental deficiency
      • 6101.04 Psychopathology
      • 6101.99 Other (specify)
    • 6102 Adolescent and child psychology
      • 6102.01 Development psychology
      • 6102.02 Learning disabilities
      • 6102.03 Mental retardation
      • 6102.04 School psychology
      • 6102.05 Speech pathology
      • 6102.99 Other (specify)
    • 6103 Counselling and guidance
      • 6103.01 Behavior therapy
      • 6103.02 Consulting psycholgy
      • 6103.03 Educational counselling and guidance
      • 6103.04 Group therapy
      • 6103.05 Mental retardation
      • 6103.06 Psychoanalysis
      • 6103.07 Psychotherapy
      • 6103.08 Rehabilitation
      • 6103.09 Vocational guidance
      • 6103.99 Other (specify)
    • 6104 Educational psychology
      • 6104.01 Cognitive functioning
      • 6104.02 Educational methods
      • 6104.03 Laws of learning
      • 6104.04 Psycholinguistics
      • 6104.99 Other (specify)
    • 6105 Evaluation and measurement in psychology
      • 6105.01 Differential psychology
      • 6105.02 Experimental design
      • 6105.03 Measurement theory
      • 6105.04 Statistics
      • 6105.05 Psychometrics
      • 6105.06 Scale analysis
      • 6105.07 Test construction
      • 6105.08 Tests theory
      • 6105.09 Test validation
      • 6105.99 Other (specify)
    • 6106 Experimental psychology
      • 6106.01 Brain function
      • 6106.02 Comparative psychology
      • 6106.03 Emotion
      • 6106.04 Experimental analysis of behavior
      • 6106.05 Levels of function
      • 6106.06 Memory processes
      • 6106.07 Mental processes
      • 6106.08 Motivation
      • 6106.09 Perception processes
      • 6106.10 Physiological psychology
      • 6106.11 Reaction, reflexes
      • 6106.12 Sensory Processes
      • 6106.99 Other (specify)
    • 6107 General psychology
      • 6107.01 Methodology
      • 6107.02 Theory and systems
      • 6107.99 Other (specify)
    • 6108 Geriatric psychology
      • 6108.01 Death
      • 6108.02 Maturity
      • 6108.03 Senescence
      • 6108.99 Other (specify)
    • 6109 Occupational and personnel psychology
      • 6109.01 Accident prevention
      • 6109.02 Attitudes and morale
      • 6109.03 Job design and evaluation
      • 6109.04 Labour/management realtions
      • 6109.05 Organizational behaviour
      • 6109.06 Personnel selection
      • 6109.07 Performance evaluation
      • 6109.99 Other (specify)
    • 6110 Parapsychology
      • 6110.01 Extra-sensory perception
      • 6110.02 Hypnosis
      • 6110.99 Other (specify)
    • 6111 Personality
      • 6111.01 Creativity
      • 6111.02 Culture and personality
      • 6111.03 Personality development
      • 6111.04 Measurement of personality
      • 6111.05 Structure and dynamics of personality
      • 6111.06 Theory of personality
      • 6111.99 Other (specify)
    • 6112 Psychological study of social issues
      • 6112.01 Discrimination
      • 6112.02 Minority group phenomena
      • 6112.03 Public policy
      • 6112.99 Other (specify)
    • 6113 Psychopharmacology
      • 6113.01 Alcoholism
      • 6113.02 Behavioral response
      • 6113.03 Drug abuse
      • 6113.04 Drug function
      • 6113.05 Drug therapy
      • 6113.99 Other (specify)
    • 6114 Social psychology
      • 6114.01 Advertising
      • 6114.02 Attitudes
      • 6114.03 Collective behavior
      • 6114.04 Community psychology
      • 6114.05 Conflict resolution
      • 6114.06 Consumer behavior
      • 6114.07 Culture and personality
      • 6114.08 Decision processes and theory
      • 6114.09 Forensic psychology
      • 6114.10 Group interaction
      • 6114.11 Group processes
      • 6114.12 Leadership
      • 6114.13 Marketing
      • 6114.14 Political behavior
      • 6114.15 Public opinion
      • 6114.16 Role behaviour
      • 6114.17 Social perceptions and movements
      • 6114.18 Symbolic communication
      • 6114.99 Other (specify)
    • 6199 Other psychological specialities
  • 62 Sciences of Arts and Letters
    • 6201 Architecture
      • 6201.01 Architectural design
      • 6201.02 Parks and gardens
      • 6201.03 Urbanism
      • 6201.99 Other (specify)
    • 6202 Literary theory, analysis and criticism
      • 6202.01 Criticism of texts
      • 6202.02 Literary analysis
      • 6202.03 Literary style and aesthetics
      • 6202.04 Literary vocabulary
      • 6202.05 Rhetoric
      • 6202.99 Other (specify)
    • 6203 Fine arts theory, analysis and criticism
      • 6203.01 Cinematography
      • 6203.02 Dance, choreography
      • 6203.03 Decorative arts
      • 6203.04 Drawing, engraving
      • 6203.05 Fine art aesthetics
      • 6203.06 Music, musicology
      • 6203.07 Painting
      • 6203.08 Photography
      • 6203.09 Sculpture
      • 6203.10 Theatre
      • 6203.99 Other (specify)
    • 6299 Other artistic specialities
  • 63 Sociology
    • 6301 Cultural sociology
      • 6301.01 Cultural evolution
      • 6301.02 Cultural relations
      • 6301.03 Folklore
      • 6301.04 Inter-ethnic relations
      • 6301.05 Language and Culture
      • 6301.06 National character and civilisation
      • 6301.07 Sociology of art
      • 6301.08 Sociology of law
      • 6301.09 Sociology of literature
      • 6301.10 Sociology of religion
      • 6301.99 Other (specify)
    • 6302 Experimental sociology
      • 6302.01 Field data collection
      • 6302.02 Social psychology
      • 6302.03 Social survey design
      • 6302.04 Social survey methods
      • 6302.99 Other (specify)
    • 6303 General sociology
      • 6303.01 Comparative sociology
      • 6303.02 Historical sociology
      • 6303.03 Methodology
      • 6303.04 Sociography
      • 6303.05 Theory
      • 6303.99 Other (specify)
    • 6304 International disorder
      • 6304.01 Conflicts
      • 6304.02 Conflicts resolution
      • 6304.03 War and peace
      • 6304.99 Other (specify)
    • 6305 Mathematical sociology
      • 6305.01 Measure and index construction
      • 6305.02 Model building
      • 6305.03 Statistical analysis
      • 6305.99 Other (specify)
    • 6306 Occupational sociology
      • 6306.01 Bureaucracy
      • 6306.02 Educational sociology
      • 6306.03 Industrial sociology
      • 6306.04 Medical sociology
      • 6306.05 Sociology of education
      • 6306.06 Sociology of law
      • 6306.07 Sociology of mass-media
      • 6306.08 Sociology of science
      • 6306.99 Other (specify)
    • 6307 Social change and development
      • 6307.01 Evolution of societies
      • 6307.02 Developing countries
      • 6307.03 Social policy
      • 6307.04 Social security
      • 6307.05 Social services
      • 6307.06 socio-economic development
      • 6307.07 Technology and social change
      • 6307.99 Other (specify)
    • 6308 Social communications
      • 6308.01 Signs
      • 6308.02 Sociolinguistics
      • 6308.03 Symbols
      • 6308.99 Other (specify)
    • 6309 Social groups
      • 6309.01 Casts
      • 6309.02 Elites
      • 6309.03 Family, kinship
      • 6309.04 Marriage
      • 6309.05 Social classes
      • 6309.06 Social mobility
      • 6309.07 Social stratification
      • 6309.08 Tribes
      • 6309.09 Woman’s status
      • 6309.99 Other (specify)
    • 6310 Social problems – Social disorder
      • 6310.01 Crime
      • 6310.02 Delinquency
      • 6310.03 Disease
      • 6310.04 Famine
      • 6310.05 Handicapped
      • 6310.06 Inter-racial relations
      • 6310.07 Maladjusted
      • 6310.08 Poverty
      • 6310.09 Quality of life
      • 6310.10 Social conflict and accommondation
      • 6310.11 Social welfare
      • 6310.12 Standard of living
      • 6310.13 Terrorism
      • 6310.14 Unemployment
      • 6310.99 Other (specify)
    • 6311 Sociology of human settlements
      • 6311.01 Community studies
      • 6311.02 Ecological sociology
      • 6311.03 Local sociology
      • 6311.04 Rural sociology
      • 6311.05 Slums
      • 6311.06 Urban sociology
      • 6311.99 Other (specify)
    • 6399 Other sociological specialities
  • 71 Ethics
    • 7100 Ethics
    • 7101 Classical ethics
    • 7102 Ethics of individuals
      • 7102.01 Codes of values
      • 7102.02 Codes of ethical conduct
      • 7102.03 Motivation
      • 7102.04 Philosophical ethics
      • 7102.05 Religious ethics
      • 7102.99 Other (specify)
    • 7103 Group ethics
      • 7103.01 International Declarations
      • 7103.02 National ethics
      • 7103.03 Economic ethics
      • 7103.04 Ethics of science
      • 7103.05 Transnational ethics
      • 7103.99 Other (specify)
    • 7104 Prospective ethics
    • 7199 Other specialities relating to ethics
  • 72 Philosophy
    • 7201 Philosophy of knowledge
      • 7201.01 Aporetics
      • 7201.02 Epistemology
      • 7201.03 Theory of concept
      • 7201.04 Theory of judgement
      • 7201.05 Theory of perception
      • 7201.06 Theory of reason
      • 7201.99 Other (specify)
    • 7202 Philosophical anthropology
      • 7202.01 Esthetics
      • 7202.02 Hermeneutics
      • 7202.03 Mind-body problem
      • 7202.04 Philosophy of action
      • 7202.05 Philosophy of imagination
      • 7202.06 Philosophy of intersubjectivity
      • 7202.07 Philosophy of language
      • 7202.08 Philosophy of will
      • 7202.99 Other (specify)
    • 7203 General philosophy
      • 7203.01 Dialectical logic
      • 7203.02 Dialectical materialism
      • 7203.03 Metaphysics, ontology
      • 7203.04 Natural theology
      • 7203.99 Other (specify)
    • 7204 Philosophical systems
      • 7204.01 Ancient philosophy
      • 7204.02 Modern philosophy
      • 7204.03 Present-day philosophy
      • 7204.04 Theologico-philosophical systems
      • 7204.99 Other (specify)
    • 7205 Philosophy of science
      • 7205.01 Philosophy of biology
      • 7205.02 Philosophy of logic
      • 7205.03 Philosophy of mathematics
      • 7205.04 Philosophy of physics
      • 7205.05 Philosophy of social sciences
      • 7205.99 Other (specify)
    • 7206 Philosophy of nature
      • 7206.01 Philosophy of life
      • 7206.02 Philosophy of matter
      • 7206.03 Philosophy of space and time
      • 7206.99 Other (specify)
    • 7207 Social philosophy
      • 7207.01 Philosophy of culture
      • 7207.02 Philosophy of history
      • 7207.03 Philosophy of techniques
      • 7207.04 Political philosophy
      • 7207.05 Theory of ideologies
      • 7207.99 Other (specify)
    • 7208 Philosophical doctrines
    • 7209 Other philosophical specialities