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Pascal Classification Scheme

001 Exact sciences and technology.
- 001A Sciences and techniques of general use.
- 001B Physics
  - 001B00 General.
  - 001B10 The physics of elementary particles and fields.
  - 001B20 Nuclear physics.
    - 001B20A Nuclear structure.
    - 001B20C Radioactive decay and in-beam spectroscopy.
    - 001B20D Nuclear reactions: general.
    - 001B20E Nuclear reactions: specific reactions.
    - 001B20F Nuclear astrophysics.
    - 001B20G Properties of specific nuclei listed by mass ranges.
    - 001B20H Nuclear engineering and nuclear power studies.
    - 001B20I Experimental methods and instrumentation for elementary-particle and nuclear physics.
      - 001B20I17 Electrostatic, collective, and linear accelerators.
      - 001B20I20 Cyclic accelerators and storage rings.
      - 001B20I25 Particle sources and targets.
        
        001B20I25B Electron sources.
        
        001B20I25D Neutron sources.
        
        001B20I25L Ion sources: polarized.
        
        001B20I25N Ion sources: positive and negative.
        
        001B20I25P Polarized and other targets.
        
        001B20I25R Sources of radioactive nuclei.
      - 001B20I27 Beams in particle accelerators.
      - 001B20I30 Spectrometers and spectroscopic techniques.
      - 001B20I40 Radiation detectors, dosimeters.
        
        001B20I40C Gas-filled counters: ionization chambers, proportional, and avalanche counters.
        
        001B20I40G Tracking and position-sensitive detectors.
        
        001B20I40K Cherenkov detectors.
        
        001B20I40M Scintillation detectors.
        
        001B20I40R Nuclear emulsions.
        
        001B20I40V Calorimeters.
        
        001B20I40W Solid-state detectors.
      - 001B20I50 Computer interfaces.
      - 001B20I85 Computer data analysis.
      - 001B20I90 Other topics in elementary-particle and nuclear physics experimental methods and instrumentation.
  - 001B30 Atomic and molecular physics.
    - 001B30A Electronic structure of atoms, molecules and their ions: theory.
    - 001B30B Atomic properties and interactions with photons.
    - 001B30C Molecular properties and interactions with photons.
      - 001B30C15 Properties of molecules and molecular ions.
      - 001B30C20 Molecular spectra.
        
        001B30C20B Radio-frequency and microwave spectra.
        
        001B30C20E Infrared spectra.
        
        001B30C20F Raman and Rayleigh spectra (including optical scattering).
        
        001B30C20K Visible spectra.
        
        001B30C20L Ultraviolet spectra.
        
        001B30C20N Vacuum ultraviolet spectra.
        
        001B30C20R X-ray spectra.
        
        001B30C20S Rotational analysis.
        
        001B30C20T Vibrational analysis.
        
        001B30C20V Vibration-rotation analysis.
        
        001B30C20W Vibronic, rovibronic and rotation-electron-spin interactions.
      - 001B30C25 Nuclear resonance and relaxation.
      - 001B30C35 Electron resonance and relaxation.
      - 001B30C40 Multiple resonances (including double and higher-order resonance processes, such as double nuclear magnetic resonance, electron double resonance and microwave optical double resonance).
      - 001B30C45 Mössbauer spectra.
      - 001B30C50 Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion).
      - 001B30C55 Optical activity and dichroism; magnetooptical and electrooptical spectra.
      - 001B30C60 Photoelectron spectra.
        
        001B30C60C Ultraviolet and vacuum ultraviolet photoelectron spectra.
        
        001B30C60F X-ray photoelectron spectra.
      - 001B30C70 Intensities and shapes of molecular spectral lines and bands.
      - 001B30C80 Photon interactions with molecules.
      - 001B30C90 Other topics in molecular properties and interactions with photons.
    - 001B30D Atomic and molecular collision processes and interactions.
    - 001B30F Studies of special atoms, molecules and their ions; clusters.
    - 001B30G Mechanical control of atoms, molecules and ions.
  - 001B40 Fundamental areas of phenomenology (including applications).
  - 001B50 Physics of gases, plasmas and electric discharges.
  - 001B60 Condensed matter: structure, mechanical and thermal properties.
    - 001B60A Structure of solids and liquids; crystallography.
    - 001B60B Mechanical and acoustical properties of condensed matter.
    - 001B60C Lattice dynamics.
    - 001B60D Equations of state, phase equilibria, and phase transitions.
    - 001B60E Thermal properties of condensed matter.
    - 001B60F Transport properties of condensed matter (nonelectronic).
    - 001B60G Quantum fluids and solids; liquid and solid helium.
      - 001B60G20 Quantum effects on the structure and dynamics of nondegenerate fluids (e.g., normal phase liquid ⁴He).
      - 001B60G40 Boson degeneracy and superfluidity of ⁴He.
      - 001B60G55 Normal phase of liquid ³He.
        
        001B60G55C Thermodynamic properties.
        
        001B60G55F Hydrodynamics.
        
        001B60G55H Transport properties.
        
        001B60G55J Collective modes.
        
        001B60G55L Impurities.
      - 001B60G57 Superfluid phase of liquid ³He.
        
        001B60G57B Thermodynamic properties.
        
        001B60G57D Superflow and hydrodynamics.
        
        001B60G57F Textures and vortices.
        
        001B60G57H Transport properties.
        
        001B60G57J Collective modes.
        
        001B60G57L Spin dynamics.
        
        001B60G57N Behavior near interfaces.
        
        001B60G57P Impurities.
      - 001B60G60 Mixed systems; liquid ³He-⁴He mixtures.
      - 001B60G65 Spin-polarized hydrogen and helium.
      - 001B60G70 Films (including physical adsorption).
      - 001B60G80 Solid helium and related quantum crystals.
      - 001B60G90 Other topics in quantum fluids and solids; liquid and solid helium.
    - 001B60H Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties).
  - 001B70 Condensed matter: electronic structure, electrical, magnetic, and optical properties.
  - 001B80 Cross-disciplinary physics: materials science; rheology.
- 001C Chemistry.
- 001D Applied sciences.
  - 001D00 General aspects.
  - 001D01 Operational research. management science.
  - 001D02 Computer science; control theory; systems.
  - 001D03 Electronics.
  - 001D04 Telecommunications and information theory.
  - 001D05 Electrical engineering. electrical power engineering.
  - 001D06 Energy.
    - 001D06A General, economic and professional studies.
    - 001D06B Fuels.
      - 001D06B01 Coal and derived products.
        
        001D06B01A General.
        
        001D06B01B Structure, chemical and physical properties.
        
        001D06B01C Processing.
        
        001D06B01D Coal and coke storage, transportation and distribution.
        
        001D06B01E Miscellaneous: general maintenance, miscellaneous installations, waste waters, etc.
      - 001D06B02 Crude oil, natural gas and petroleum products.
      - 001D06B03 Gas industry.
      - 001D06B04 Nuclear fuels.
      - 001D06B05 Wood. Peat. Brown coal.
      - 001D06B06 Alternative fuels. Production and utilization.
      - 001D06B07 Fuel processing. Carbochemistry and petrochemistry.
        
        001D06B07A General.
        
        001D06B07B Equipment. Control. Automation. Maintenance. Corrosion.
        
        001D06B07C Solid fuel processing (coal, coke, brown coal, peat, wood, etc.).
        
        001D06B07D Liquid petroleum product processing.
        
        001D06B07E Gas processing.
        
        001D06B07F Coal and petroleum industry by products processing.
    - 001D06C Natural energy.
    - 001D06D Energy. Thermal use of fuels.
  - 001D07 Chemical engineering.
  - 001D08 Chemical industry and chemicals.
  - 001D09 Physicochemistry of polymers.
  - 001D10 Polymer industry, paints, wood.
  - 001D11 Metals. metallurgy.
  - 001D12 Mechanical engineering. machine design.
  - 001D13 Material handling, hoisting. storage. packaging.
  - 001D14 Buildings. public works.
  - 001D15 Ground, air and sea transportation, marine construction.
  - 001D16 Pollution.
  - 001D17 Other techniques and industries.
- 001E Earth, ocean, space.
  - 001E01 Earth sciences.
  - 001E02 External geophysics.
  - 001E03 Astronomy.
    - 001E03A Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations.
    - 001E03B Solar System.
    - 001E03C Stars.
      - 001E03C10 Stellar characteristics and properties.
      - 001E03C20 Normal stars (by class): general or individual.
        
        001E03C20E Main-sequence: early-type stars (O and B).
        
        001E03C20G Main-sequence: intermediate-type stars (A and F).
        
        001E03C20J Main-sequence: late-type stars (G, K, and M).
        
        001E03C20L Giant and subgiant stars.
        
        001E03C20P Supergiant stars.
        
        001E03C20R Faint blue stars (including blue stragglers), white dwarfs, degenerate stars, nuclei of planetary nebulae.
        
        001E03C20T Population II stars (horizontal branch, metal poor, etc.).
        
        001E03C20V Low luminosity stars, subdwarfs, and brown dwarfs.
        
        001E03C20W Population III stars.
      - 001E03C21 Pre-main sequence objects, young stellar objects (YSO's) and protostars (T Tauri stars, Orion population, Herbig-Haro objects, Bok globules, bipolar outflows, cometary nebulae, etc.).
      - 001E03C30 Variable and peculiar stars (including novae).
      - 001E03C60 Late stages of stellar evolution (including black holes).
      - 001E03C80 Binary and multiple stars.
      - 001E03C82 Extrasolar planetary systems.
      - 001E03C90 Other topics on stars.
    - 001E03D Stellar systems. Galactic and extragalactic objects and systems. The Universe.
    - 001E03E Extraterrestrial life and intelligence.
002 Biological and medical sciences.

Francis Classification Scheme