| UDC |
Title of category |
| 00 |
Fundamentals of knowledge and culture. |
| 001 |
Science and knowledge in general. Organization of intellectual work. Including: Scientific terminology, methodology, research. |
| 002 |
Documentation. Books. Writings. Authorship. |
| 004 |
Computer science and technology. Computing. Data processing. |
| 004.05 |
System and software quality. |
| 004.08 |
Input, output and storage media. |
| 004.31 |
Processing units. Processing circuits. |
| 004.38 |
Computers. Kinds of computer. |
| 006 |
Standardization of products, operations, weights, measures and time. Including: Standards. Specifications. Codes of practice. Recommendations. |
| 008 |
Civilization. Culture. Progress. |
| 084 |
Pictorial material. Including: Collections of illustrations, plans, maps. |
| 1 |
PHILOSOPHY. PSYCHOLOGY. |
| 32 |
Politics. |
| 331 |
Labour. Employment. Work. Labour economics. Organization of labour. |
| 51 |
Mathematics. |
| 511 |
Number theory. |
| 512 |
Algebra. |
| 514 |
Geometry. |
| 514.7 |
Differential geometry. Algebraic and analytic methods in geometry. |
| 517 |
Analysis. |
| 517.9 |
Differential equations. Integral equations. Other functional equations. Finite differences. Calculus of variations. Functional analysis. |
| 519.1 |
Combinatorial analysis. Graph theory. |
| 519.2 |
Probability. Mathematical statistics. |
| 519.6 |
Computational mathematics. Numerical analysis. |
| 519.7 |
Mathematical cybernetics. |
| 519.8 |
Operational research (OR) mathematical theories and methods. |
| 52 |
Astronomy. Astrophysics. Space research. Geodesy. |
| 520 |
Astronomical instruments and techniques. |
| 521 |
Theoretical astronomy. Celestial mechanics. |
| 521.9 |
Astrometry. Spherical astronomy. Including: Calculations of ephemerides. |
| 523.3 |
Earth-Moon system. Including: The Earth. The Moon. |
| 523.4 |
Planets and their satellites. Planetology. |
| 523.6 |
Interplanetary medium. Comets. Meteors. Meteorites. |
| 523.9 |
The Sun. Solar physics. Including: Active Sun. Solar activity. Sunspots. |
| 524 |
Stars. Stellar systems. The Universe. |
| 524.3 |
Stars. Including: Variable stars. Novae. Supernovae and related objects. Peculiar stars: Pulsars. Neutron stars. |
| 528 |
Geodesy. Surveying. Photogrammetry. Remote sensing. Cartography. |
| 53 |
Physics. |
| 535 |
Optics. |
| 536 |
Heat. Thermodynamics. Statistical physics. |
| 537 |
Electricity. Magnetism. Electromagnetism. |
| 539 |
Physical nature of matter. |
| 54 |
Chemistry. Crystallography. Mineralogy. |
| 550.3 |
Geophysics. |
| 550.4 |
Geochemistry. |
| 550.8 |
Applied geology and geophysics. Geological prospecting and exploration. Interpretation of results. |
| 550.93 |
Geochronology. Geological dating. Determination of absolute geological age. |
| 551 |
General geology. Meteorology. Climatology. Historical geology. Stratigraphy. Palaeogeography. |
| 552 |
Petrology. Petrography. |
| 552.6 |
Meteorites. |
| 553 |
Economic geology. Mineral deposits. |
| 56 |
Palaeontology. |
| 62 |
Engineering. Technology in general. |
| 62-5 |
Operation and control of machines and processes. |
| 62-8 |
Machines according to motive power, propulsive force. Source of energy of machine. |
| 621 |
Mechanical engineering in general. Nuclear technology. Electrical engineering. Machinery. |
| 621.3 |
Electrical engineering. |
| 629.7 |
Air and space transport engineering. Aeronautics and aircraft. Rockets and missiles. Astronautics and spacecraft. |
| 65 |
Communication and transport industries. Accountancy. Business management. Public relations. |
| 66 |
Chemical technology. Chemical and related industries. |
| 678.6 |
Synthetic polycondensation products. Polycondensates. Synthetic resins. Synthetic fibres etc. Including: Polyester. Polyamide (nylon). |
| 681.1 |
Apparatus with wheel or motor mechanisms. Including: Horology. Watch and clock making. Reckoners of consumption. Registering, recording and control devices. |
| 681.2 |
Instrument-making in general. Instrumentation. Measuring instruments and their manufacture. Balances. Weighing devices. |
| 681.5 |
Automatic control technology. Smart technology. |
| 681.6 |
Graphic reproduction machines and equipment. Including: Typewriters. Composing machines. Printing presses. Graphic reproduction machines. Printing machines. |
| 681.7 |
Optical apparatus and instruments. Including: Lenses. Fibre-optic devices. Magnifiers. Microscopes. Spectacles. Telescopes. Binoculars. |
| 681.8 |
Technical acoustics. Including: Musical instruments. Mechanical and electric musical instruments. Sound recording and reproduction. |
| 683 |
Ironmongery. Hardware. Locksmithing. Bottling. Lamps. Including: Door furniture. Fuel or flame lamps, lanterns. Stoves. Heating appliances. |
| 69 |
Building (construction) trade. Building materials. Building practice and procedure. |
| 744 |
Linear and geometric drawing. Technical drawing. |
| 77 |
Photography and similar processes. |
| 8 |
LANGUAGE. LINGUISTICS. LITERATURE. |
| 91 |
Geography. Exploration of the Earth and of individual countries. Travel. Regional geography. |
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Description of images 
Images were obtained by scanning paper cards of scientific library.