| A |
General Works |
| B |
Philosophy. Psychology. Religion |
| C |
Auxiliary Sciences of History |
| D |
History (General) and History of Europe |
| E |
History : America |
| F |
History : America |
| G |
Geography. Maps. Anthropology. Recreation |
| H |
Social Sciences (General) |
| HA -- Statistics | |
| HB -- Economic theory. Demography | |
| HC -- Economic history and conditions | |
| HD -- Industries. Land use. Labor | |
| HE -- Transportations and communications | |
| HF -- Commerce | |
| HG -- Finance | |
| HJ -- Public Finance | |
| HM -- Sociology (General) | |
| HN -- Social history and conditions. Social problems. Social reform | |
| HQ -- The family. Marriage. Women | |
| HS -- Societies: secret, benevolent, etc. | |
| HT -- Communities. Classes. Races | |
| HV -- Social pathology. Social and public welfare. Criminology | |
| HX -- Socialism. Communism. Anarchism | |
| J |
Political Science |
| K |
Law |
| L |
Education |
| M |
Music and Books on Music |
| N |
Fine Arts |
| P |
Language and Literature |
| Q |
Science (General) |
| QA -- Mathematics. Computer science. Electronic data processing | |
| QB
-- Astronomy |
|
| QC -- Physics | |
| QD -- Chemistry | |
| QE -- Geology | |
| QH -- Natural history. Biology | |
| QK -- Botany | |
| QL -- Zoology | |
| QM -- Human anatomy | |
| QP -- Physiology | |
| QR -- Microbiology | |
| R |
Medicine |
| S |
Agriculture |
| T |
Technology (General) |
| TA
-- Engineering (General). Civil engineering (General) |
|
| TC -- Hydraulic engineering. Ocean engineering | |
| TD -- Environmental technology. Sanitary engineering | |
| TE -- Highway engineering. Roads and pavements | |
| TF -- Railroad engineering and operation | |
| TG -- Bridge engineering | |
| TH -- Building construction | |
| TJ -- Mechanical engineering and machinery | |
| TK -- Electrical engineering. Electronics. Nuclear engineering | |
| TL -- Motor vehicles. Aeronautics. Astronautics | |
| TN -- Mining engineering. Metallurgy | |
| TP -- Chemical technology | |
| TR -- Photography | |
| TS -- Manufactures | |
| TT -- Handicrafts. Arts and crafts | |
| TX -- Home economics | |
| U
|
Military Science |
| V |
Naval Science |
| Z |
Bibliography. Library Science. Information Resources. |
