| 000 | Phenomena & entities from a multi- or non-disciplinary point of view |
| 100 | Knowledge generally |
| 1002 | | Information sciences |
| 10022 | | | Libraries |
| 10023 | | | Archives |
| 10024 | | | Museums |
| 10243 | | | Exhibitions |
| 1003 | | Communication sciences |
| 10031 | | | Communication and information theory |
| 10032 | | | Communication media science |
| 100321 | | | | Sound communication media |
| 100322 | | | | Visual communication media |
| 100323 | | | | Audiovisual communication media |
| 100324 | | | | Reprography and printing |
| 100325 | | | | Book trade |
| 10036 | | | Intellectual property |
| 10037 | | | Destination-directed communication |
| 10038 | | | Mass communication |
| 10039 | | | Publicity, public opinion and user research |
| 1004 | | Systemology and cybernetics |
| 1005 | | Management |
| 1006 | | Standardisation and standards |
| 1007 | | Organisations |
| 1008 | | Research |
| 10081 | | | Discoveries, inventions and patents |
| 10082 | | | Testing & trials |
| 1009 | | Metrology |
| 110 | Science of science |
| 120 | Philosophy |
| 1201 | | Viewpoints, doctrines, systems, schools (e.g. Rationalism, Existentialism) |
| 1202 | | Branches, fields, problems (e.g. metaphilosophy, metaphysics, epistemology) |
| 1203 | | Morals and ethics |
| 1204 | | History of Philosophy |
| 1205 | | Philosophy of particular cultures |
| 12051 | | | Western philosophy |
| 12052 | | | Eastern philosophy |
| 130 | Logic |
| 1301 | | Fallacies |
| 1302 | | Pure logic |
| 1303 | | Formal logic |
| 1304 | | Practical logic |
| 140 | Mathematics & statistics |
| 150 | Computer science |
| 200 | Natural sciences |
| 205 | | Physical sciences |
| 210 | | | Physics |
| 230 | | | Chemistry |
| 239 | | | | Crystallography |
| 250 | | | Space and earth sciences |
| 260 | | | | Astronomy and astrophysics |
| 270 | | | | Geology |
| 290 | | | | Geography |
| 300 | | Life sciences |
| 310 | | Biological sciences |
| 320 | | | Microbiology |
| 330 | | | Botany |
| 340 | | | Zoology |
| 400 | Behavioural sciences |
| 410 | | Psychology |
| 420 | Education |
| 470 | Human needs |
| 4702 | | Consumer or user requirements |
| 4703 | | Fashions and trends |
| 4704 | | Food and nutrition |
| 47041 | | | Nutrients |
| 47042 | | | Food |
| 4705 | | Clothing and personal adornment |
| 4706 | | Housing. Homes |
| 47060 | | | Household science |
| 4707 | | Furniture and furnishing |
| 477 | | Work and leisure occupations |
| 4770 | | | Vocation and career studies |
| 4771 | | | Leisure and recreation |
| 47711 | | | | Play and toys |
| 47712 | | | | Hobbies |
| 47713 | | | | Collecting |
| 47714 | | | | Passive recreation |
| 47716 | | | | Tourism & travel |
| 47717 | | | | Sports & games |
| 477173 | | | | | Individual prowess & athletic sports |
| 477174 | | | | | Ball games |
| 477175 | | | | | Special environment sports |
| 477176 | | | | | Wheel vehicle sports |
| 477177 | | | | | Animal sports |
| 477178 | | | | | Target & quarry sports |
| 477179 | | | | | Board & piece games |
| 47718 | | | | Social diversions & pastimes |
| 510 | History & related sciences |
| 5101 | | Biography |
| 5102 | | Archaeology |
| 5103 | | Other ancillary studies: numismatic, sigillography... |
| 5104 | | By subject: Political, economical, social |
| 5105 | | History of particular epochs and periods |
| 51051 | | | Ancient history |
| 51052 | | | Mediaeval history |
| 51053 | | | Modern history |
| 5106 | | History of particular countries |
| 520 | Area studies |
| 527 | Society |
| 5271 | | Social groups & communities |
| 52711 | | | Ethnic & linguistic & religious groups |
| 530 | Social sciences |
| 5301 | | Culture |
| 5302 | | Cultural anthroplogy |
| 5303 | | Sociology |
| 5304 | | Demography |
| 5305 | | Political science & politics |
| 5306 | | Public administration |
| 5307 | | Law |
| 5308 | | Social welfare |
| 5309 | | Economics |
| 5310 | | Management of enterprises |
| 590 | Religion. Theology |
| 5901/5909 | | Religious systems. Religions and faiths |
| 595 | Esoteric practices & movements |
| 5951 | | Research, paranormal psychology |
| 5952 | | Occultism & the supernatural |
| 5953 | | Alchemy |
| 5954 | | Astrology |
| 5955 | | Chiromancy |
| 5956 | | Magic |
| 5957 | | Sciosophic practices & movements |
| 5958 | | Secret and semi-secret societies and fraternities |
| 600 | Technology and applied sciences |
| 6000 | | Scientific basis of technology |
| 6001 | | Computer technology |
| 6002 | | Technical & industrial design |
| 6003 | | Production technology |
| 6004 | | Electronic & electrical technologies |
| 60041 | | | Electronic engineering |
| 600411 | | | | Telecommunication engineering |
| 60042 | | | Electrical engineering |
| 6005 | | Thermal engineering |
| 6006 | | Mechanical engineering |
| 710 | | Construction technology |
| 7101 | | | Operations |
| 7102 | | | Construction materials |
| 712 | | Civil engineering |
| 7125 | | | Structural engineering |
| 7126 | | | Civil engineering material |
| 7127 | | | Parts of civil engineering structures |
| 71271 | | | | Structural members |
| 712711 | | | | | Girders |
| 712712 | | | | | Trusses |
| 712713 | | | | | Columns |
| 712714 | | | | | Shells |
| 712715 | | | | | Membranes |
| 71272 | | | | Walls |
| 71273 | | | | Roofs |
| 71274 | | | | Floors |
| 714 | | Illuminating engineering |
| 716 | | Building construction & services |
| 7163 | | | Building materials |
| 7164 | | | Protection |
| 7165 | | | Building construction work |
| 71651 | | | | Masonry |
| 71652 | | | | Concrete construction |
| 71653 | | | | Steel & other metal construction |
| 71654 | | | | Timber construction |
| 7166 | | | Parts of buildings |
| 71661 | | | | Covering. Facings |
| 71662 | | | | Foundations |
| 71663 | | | | Walls |
| 716631 | | | | | Wallpaper |
| 71664 | | | | Roofs |
| 71665 | | | | Floors |
| 7167 | | | Engineering services & installations in building |
| 71671 | | | | Heating |
| 71672 | | | | Ventilation |
| 71673 | | | | Electrical installations |
| 71674 | | | | Plumbing |
| 7168 | | | Finishing & decorating trades |
| 717 | | Building of particular types |
| 7171 | | | Residential buildings |
| 7172 | | | Public service, commercial & office buildings |
| 7173 | | | Industrial buildings |
| 722 | | Architecture 961 Architecture as an art |
| 7220 | | | Architects & architectural profession |
| 7221 | | | Architectural practice |
| 7222 | | | Architectural design & draughtsmanship |
| 7223 | | | Interior design |
| 724 | | Landscape design |
| 726 | | Physical planning |
| 730 | | Environmental technology |
| 740 | | Transport technology & services |
| 7401 | | | Road transport |
| 7402 | | | Railway transport |
| 7403 | | | Water transport |
| 7404 | | | Air transport |
| 760 | | Military science & technology |
| 7601 | | | Warfare |
| 7602 | | | Weapons in warfare |
| 780 | | Mining |
| 800 | | Process industries |
| 8001 | | | Food & drink technology |
| 80011 | | | | Tobacco processing |
| 80012 | | | | Mineral processing technology |
| 8002 | | | Metal technology |
| 80021 | | | | Metal products |
| 800211 | | | | | Metallurgy of particular & kinds of metals |
| 8002111 | | | | | | Alloys |
| 8002112 | | | | | | Ferrous metallurgy |
| 800212 | | | | | Non-ferrous metallurgy |
| 8003 | | | Wood, pulp & paper technology |
| 8004 | | | Leather & other animal products technology |
| 8005 | | | Textiles technology |
| 8006 | | | Cordage & wire rope making |
| 8007 | | | Manufacture & technology of particular |
| 890 | | Applications of life sciences |
| 8901 | | | Agriculture |
| 89011 | | | | Horticulture |
| 89012 | | | | Animal husbandry |
| 8902 | | | Veterinary science |
| 8903 | | | Forestry |
| 8904 | | | Wildlife exploitation |
| 8905 | | | Environment |
| 89051 | | | | Natural resources |
| 8906 | | | Biomedical sciences |
| 89061 | | | | Medicine |
| 890611 | | | | | Diseases |
| 890612 | | | | | Parts, organs & systems of the human body |
| 8906121 | | | | | | Body parts & regional specialties |
| 8906122 | | | | | | Body organs & systems |
| 89061221 | | | | | | | Defence system |
| 89061222 | | | | | | | Integumentary & musculoskel. syst. |
| 89061223 | | | | | | | Visceral systems & organs |
| 89061224 | | | | | | | Nervous system & sense organs |
| 89061225 | | | | | | | Mental health & disorders |
| 910 | Language & literature |
| 9101 | | Linguistics |
| 9102 | | Use of language |
| 9103 | | Special philological studies |
| 9105 | | Literature |
| 940 | Arts |
| 941 | | Architecture as an art |
| 9411 | | | Architectural aesthetics |
| 9412 | | | Architectural periods and styles |
| 942 | | Landscaping as an art |
| 943 | | Plastic arts |
| 944 | | Drawing, painting, print making |
| 945 | | Photography as art |
| 946 | | Decorative arts & handicrafts |
| 947 | | Music |
| 9471 | | | Vocal music |
| 9472 | | | Instrumental music |
| 948 | | Performing arts |
| 9481 | | | Theatre |
| 9482 | | | Opera |
| 9483 | | | Cinema |