Main Classification Groups
Astronomy
- A - 1 Bibliography, Year Books, Institutes
 
- A - 2 History of Astronomy
 
- A - 3 Astronomy in General / Related Fields
- A 3-1 Handbooks, Astronomy Dictionaries
 - A 3-2 Symposium and Colloquium Series, Compendia, Review Series
 - A 3-3 Textbooks
 - A 3-4 General Literature, Introductions
 - A 3-5 Teaching of Astronomy
 - A 3-6 Popular Astronomy
 - A 3-7 Astrology, Mythology
 - A 3-8 Extraterrestrial Life, Astrobiology
 - A 3-9 Festschriften
 
 
- A - 4 Instrumentation
- A 4-1 Ancient Instruments, History of Telescopes
 - A 4-2 Telescopes and Domes in General / User Manuals
 - A 4-3 Optics
 - A 4-4 Electronics
 - A 4-5 Photography
 - A 4-6 Mechanical Design
 - A 4-7 Chronometry
 - A 4-8 Spectroscopy
 - A 4-9 Infrared Techniques
 - A 4-10 Accessoires
 - A 4-11 Measuring Instruments and Techniques
 - A 4-12 Other Instrumental Fields
 - A 4-13 Photoelectric Devices / Image Tubes / CCD
 - A 4-14 Site Selection
 - A 4-15 Electronic Imaging Devices
 - A 4-16 Interferometry
 - A 4-17 Gravitational Wave Astrophysics
 
 
- A - 5 Positional Astronomy
 
- A - 6 Celestical Mechanics, Orbit Determination
 
- A - 7 Theoretical Astrophysics
- A 7-1 Basic and General Problems
 - A 7-2 Magnetic Fields, Synchrotron Radiation
 - A 7-3 Radiative Transfer
 - A 7-4 Stellar Atmospheres
 - A 7-5 Planetary Atmospheres
 - A 7-6 Nuclear Processes
 - A 7-7 Stellar Constitution and Evolution
 - A 7-8 Planetary Constitution
 - A 7-9 High Energy
 - A 7-10 Plasma Astrophysics
 - A 7-11 Accretion
 
 - A - 8 Radio Astronomy
 - A - 9 Cosmic Rays, X-Rays, Gamma-Rays, UV Radiation, etc.
 - A - 10 Space Research, Especially Techniques
 - A - 11 The Sun
- A 11-1 Basic and General Problems
 - A 11-2 Solar Eclipses
 - A 11-3 Solar Survey
 - A 11-4 Photosphere, Spectrum, Granulation
 - A 11-5 Sunspots, Faculae, Solar Activity
 - A 11-6 Chromosphere, Flares, Prominences
 - A 11-7 Corona
 - A 11-8 Electromagnetic and Corpuscular Radiation
 - A 11-9 Radio Observations
 - A 11-10 Helioseismology
 
 - A - 12 The Earth
 - A - 13 The Moon
 - A - 14 The Planets, Planetary Systems, and Extrasolar Planets
 - A - 15 Interplanetary Objects
 - A - 16 Large Star Catalogs
 - A - 17 Stars in General
- A 17-1 General
 - A 17-2 Parallaxes, Distances including Parallax Catalogs
 - A 17-3 Motions including Radial Velocity Catalogs
 - A 17-4 Photometry including Photometric Catalogs
 - A 17-5 Spectra, Colors including Catalogs
 - A 17-6 Luminosities, Masses, Radii, Diagrams
 - A 17-7 Figure, Rotation
 - A 17-8 Atmospheres: Observational Studies (Abundances, Magnetic Fields)
 - A 17-9 Chromospheres, Coroni, Winds, Mass-Loss
 - A 17-10 Polarization
 - A 17-11 White Dwarfs
 - A 17-12 Neutron Stars
 - A 17-13 Star Birth, Early Stellar Evolution
 
 - A - 18 Double Stars, Eclipsing Binaries
 - A - 19 Variable Stars
 - A - 20 Interstellar Matter, Planetary Nebulae
 - A - 21 Star Clusters
 - A - 22 Structure and Dynamics of the Galaxy
 - A - 23 Dynamics of Stellar Systems
 - A - 24 Extragalactic Systems
- A 24-1 Catalogs
 - A 24-2 General
 - A 24-3 Magellanic Clouds
 - A 24-4 Individual Galaxies (incl. Disks and Bars)
 - A 24-5 Nuclei of Galaxies, AGNs, Jets
 - A 24-6 Clusters of Galaxies
 - A 24-7 Radio Galaxies
 - A 24-8 Photometry of Galaxies
 - A 24-9 Halos etc.
 - A 24-10 Active Galaxies, Seyferts
 - A 24-11 Intergalactic Medium
 - A 24-12 Infrared Galaxies
 
 - A - 25 Quasars and Other Peculiar Objects
 - A - 26 Cosmology
 
Engineering / Computers
- E 1 Project Management
 - E 2 Technical Handbooks
 - E 3 Mechanics
 - E 4 Electricity
 - E 5 Electronics
- E 5-1 General
 - E 5-2 Theoretical Engineering
 - E 5-3 Tubes
 - E 5-4 Semiconductors
 - E 5-5 Supraconductors
 - E 5-6 Integrated Circuits
 - E 5-7 Circuitry
 - E 5-8 Logic
 - E 5-9 Pulse Technique
 - E 5-10 Digital Technique
 - E 5-11 Systems Engineering
 - E 5-12 Servo Technique
 - E 5-13 Control and Automation
 - E 5-14 Instrumentation
 - E 5-15 Propagation Communication
 - E 5-16 Materials and Integration
 - E 5-17 Microcircuits and Packaging
 - E 5-18 Signal Processing
 - E 5-19 Image Processing
 - E 5-20 Opto-electronics
 - E 5-21 Standards
 - E 5-22 Power supply
 - E 5-23 High frequency technics
 
 - E 6 Computers
- E 6-1 General
 - E 6-2 Hardware, Computer Systems Hardware
 - E 6-3 Software, Operating Systems and Languages
 - E 6-4 Computer Storage Devices
 - E 6-5 Software: Application Programs
 - E 6-6 Communications, WWW, HTML, XML etc.
 - E 6-7 CAD (Computer Aided Design)
 - E 6-8 Artificial Intelligence, Neural Networks, Virtual Reality
 - E 6-9 Retrieval and Databases
 - E 6-10 Parallel and Vector Processing, Algorithms
 
 - E 7 Civil Engineering
 
Handbooks / Dictionaries
- H - 1 Dictionaries (non-technical)
 - H - 2 Organizational Matters, Organizational Behavior
 - H - 3 Bibliographies (non-astronomical)
 - H - 4 Library Matters
 - H - 5 Varia
 - H - 6 Safety
 - H - 7 Leadership
 - H - 8 Management
 - H - 9 Time Management
 - H - 10 Negotiation, Mediation
 
Mathematics
- M 1 Algebra
 - M 2 Analysis
 - M 3 Measure Theory
 - M 4 Topology
 - M 5 Geometry
 - M 6 Foundations of Mathematics
 - M 7 Statistics, Information Theory, Combinatorics
 - M 8 Applied Mathematics
 - M 9 Mathematical Tables
 - M 10 Mathematical Handbooks, etc.
 
Physics
- PH 1 General
- PH 1-1 Handbooks
 - PH 1-2 Textbooks (general)
 - PH 1-3 Textbooks (experimental), Practical Physics
 - PH 1-4 Textbooks (theoretical Physics)
 - PH 1-5 Textbooks (mathematical Physics)
 - PH 1-6 Tables, Formulae, Units
 - PH 1-7 Popular Physics, General Literature
 - PH 1-8 Philosophy of Science, Concepts
 - PH 1-9 Biographies
 
 - PH 2 Mechanics
 - PH 3 Thermodynamics
 - PH 4 Gasdynamics: Plasma Physics
 - PH 5 Optics
- PH 5-1 General
 - PH 5-2 Theoretical Optics
 - PH 5-3 Optical Instruments, general
 - PH 5-4 Testing of Optics, Scattering, Standards
 - PH 5-5 Optical Tables
 - PH 5-6 Refraction
 - PH 5-7 Interferometry
 - PH 5-8 Spectroscopy
 - PH 5-9 Polarization
 - PH 5-10 Holography
 - PH 5-11 Proceedings
 - PH 5-12 Quantum Optics
 - PH 5-13 Fiber Optics, Optical Waveguides
 - PH 5-14 Diffraction
 - PH 5-15 Optical Technology
 - PH 5-16 Optical Remote Sensing
 - PH 5-17 Radiometry and Photometry
 - PH 5-18 Adaptive Optics
 - PH 5-19 Active Optics
 
 - PH 6 Electricity and Magnetism
 - PH 7 Atomic, Molecular and Quantum Physics
 - PH 8 Nuclear Physics
 - PH 9 High Energy Physics
 - PH 10 Theory of Relativity
 - PH 11 Solid State Physics
 - PH 12 Technical Physics
 - PH 13 Infrared Physics
 - PH 14 Ultraviolet Physics
 - PH 15 Physical Chemistry
 - PH 16 Image-Recording and Photography
 - PH 17 Hydrodynamics
 
