| 003.083 | Abbreviations. Logograms. Sigla |
| 34 | Law. Jurisprudence |
| 341.123 | United Nations Organization (UNO. UN) |
| 5 | Mathematics and Natural Sciences |
| 502 | Nature. Nature study and conservation. Nature and wildlife protection |
| 504 | Environmental sciences. Einvironmentology |
| 504.054 | Effect of harmful materials. Pollution |
| 504.4 | Hydrospheric environment |
| 528 | Geodesy. Surveying. Photogrammetry. Cartography |
| 534 | Vibrations. Acoustics |
| 539.1 | Nuclear physics. Atomic physics. Molecular physics |
| 54 | Chemistry. Mineralogical sciences |
| 54-3 | Particular kinds of compound |
| 54-32 | Acids |
| 543 | Analytical Chemistry |
| 547 | Organic Chemistry |
| 55 | Earth Sciences. Geology. Meteorology |
| 550 | Ancillary sciences of geology |
| 550.34 | Seismology. Earthquakes |
| 550.511.4 | Compositions of the Atmosphere |
| 551.1 | General structure of the Earth |
| 551.46 | Physical oceanography. Submarine topography. Ocean floor |
| 551.5 | Meteorology |
| 551.509 | Weather forecasting. Artificial influencing of weather |
| 551.510.534 | Ozone layer |
| 551.511.4 | Composition of the atmosphere |
| 551.58 | Climatology |
| 551.588 | Influence of environment on climate. Influence of topography, soil, subsoil, water, vegetation, buildings etc. |
| 553 | Economic geology. Mineral deposits |
| 556 | Hydrosphere. Water in general. Hydrology |
| 556.3 | Groundwater hydrology. Geohydrology. Hydrogeology |
| 56 | Palaeontology |
| 57 | Biological sciences in general |
| 57.08 | Biological techniques. Experimental methods. Equipment |
| 57.083.3 | Immunological methods and techniques |
| 57.087 | Methods and techniques for parameter estimation. Recording of biological data |
| 57.087.1 | Biometry |
| 574 | General ecology. Biocoenology. Hydrobiology. Biogeography |
| 574.5 | Hydrobiology. Aquatic biocoenases and ecosystems |
| 575 | General genetics. General cytogenetics. Immunogenetics. Evolution. Speciation. Phylogeny |
| 575.08 | Genetic techniques |
| 577 | Material bases of life. Biochemistry. Molecular biology. Biophysics |
| 577.1 | Chemical bases of life. Biochemistry and bio-organic chemistry generally |
| 577.15 | Enzymes. Catalysts of biological reactions.Enzymology |
| 578 | Virology |
| 58 | Botany |
| 581 | General botany |
| 582 | Systematic botany |
| 582.9 | Metachlamydeae. Sympetalae |
| 59 | Zoology |
| 592 | Systematic zoology |
| 595.76 | Coleoptera. Beetles |
| 596 | Vertebrata. Vertebrates in general |
| 597 | Pisces. Fishes. Ichthyology |
| 598 | Sauropsida |
| 598.2 | Aves. Birds in general. Ornithology |
| 599 | Mammalia. Mammals |
| 61 | Medical sciences |
| 613 | Hygiene generally. Personal health and hygiene |
| 613.6 | Occupational hazards. Industrial health and hygiene |
| 614 | Public health and hygiene. Accident prevention |
| 614.7 | Hygiene of air, water, soil. Pollution and its control |
| 614.71 | Hygiene of the air. Air pollution |
| 614.715 | Pollution by airborne dust, smoke |
| 614.76 | Pollution of both soil and air. Decomposing animal and vegetable matter. Animal dung |
| 614.777 | Water. Hygiene of water |
| 614.8 | Accidents. Risks. Hazards. Accident prevention. Personal protection. Safety |
| 615.3 | Medicaments |
| 619 | Diseases of domesticated animals. Veterinary science |
| 62 | Engineering. Technology in general |
| 620.9 | Economics of energy in general |
| 621.039 | Applied nuclear science. Atomic energy and atomic industry. Nuclear engineering in general |
| 622 | Mining |
| 626 | Hydraulic engineering in general |
| 626.8 | Agricultural hydraulics. Irrigation, drainage and reclamation engineering |
| 627 | Natural waterway, port, harbour and shore engineering. Navigational, dredging, salvage and rescue facilities. Dams and hydraulic power plant |
| 627.141 | Torrents. Torrential regimes. Origins, causes, countermeasures, controlling of torrents |
| 628 | Public health engineering. Water. Sanitation. Illuminating engineering |
| 628.1 | Water supply, treatment, consumption and use |
| 628.3 | Sewage. Surface and foul water. Properties and treatment. Sewage works |
| 628.4 | Urban hygiene. Wastes. Refuse. Rubbish. Garbage. Collection and disposal of town wastes |
| 628.477 | Utilization of treated and untreated refuse and residues |
| 628.5 | Air Pollution |
| 628.511 | Measures against dust in general |
| 63 | Agriculture and related sciences and techniques. Forestry. Farming. Wildlife exploitation |
| 630 | Forestry |
| 631 | Agriculture in general |
| 631.4 | Soil science. Pedology. Soil research |
| 631.41 | Chemical and physicochemical soil properties |
| 631.5 | Agricultural operations |
| 631.6 | Rural engineering |
| 632 | Plant damage, injuries. Plant diseases. Pests, organisms injurious to plants. Plant protection |
| 632.1 | Non-parasitic complaints. Plant diseases of complex origin |
| 632.116.1 | Rain |
| 632.35 | Bacterial diseases of plants |
| 632.38 | Virus diseases of plants |
| 632.4 | Bacterial, algal, fungal diseases of plants. Plant mycoses etc. |
| 632.6 | Animals injurious to plants (except insects) |
| 632.7 | Insects injurious to plants |
| 632.95 | Pesticides |
| 633 | Field crops and their production |
| 634 | Horticulture generally |
| 635 | Garden plants. Gardening |
| 636 | Animal husbandry and breeding in general. Livestock rearing. Breeding of domestic animals |
| 639.2 | Fishing. Fisheries |
| 639.22 | Fishing for deep-sea and inshore species |
| 639.3 | Fish breeding. Pisciculture |
| 658.5 | Production engineering and planning. Design. Production management and control |
| 66 | Chemical technology. Chemical and related industries |
| 66.0 | Chemical engineering. Chemical production, processing, operations, plant |
| 662.71 | Fuel technology of wood. Production af charcoal, wood tar, pitch |
| 662.74 | Fuel technology of hard, bituminous coal. Coke production |
| 663.1 | Microbiological industries. Science and technique of applied microbiology. Applied mycology |
| 664 | Production and preservation of solid foodstuffs |
| 665.7 | Products of the mineral oil industry. Mineral oils and similar products |
| 674 | Timber and woodworking industry |
| 71 | Physical planning. Regional, town and country planning. Landscapes, parks, gardens |