| Question |
Answer |
| Class A |
General Works |
| Subclass AC |
Collections. Series. Collected works |
| Subclass AE |
Encyclopedias |
| Subclass AG |
Dictionaries and other general reference works |
| Subclass AI |
Indexes |
| Subclass AM |
Museums. Collectors and collecting |
| Subclass AN |
Newspapers |
| Subclass AP |
Periodicals |
| Subclass AS |
Academies and learned societies |
| Subclass AY |
Yearbooks. Almanacs. Directories |
| Subclass AZ |
History of scholarship and learning. The humanities |
| Subclass B |
Philosophy (General) |
| Class B |
PHILOSOPHY. PSYCHOLOGY. RELIGION |
| Subclass BF |
Psychology |
| Subclass BL |
Religions. Mythology. Rationalism |
| Subclass BR |
Christianity |
| Subclass BX |
Christian Denominations |
| Class C |
AUXILIARY SCIENCES OF HISTORY |
| Subclass C |
Auxiliary Sciences of History (General) |
| Subclass CB |
History of Civilization |
| Subclass CS |
Genealogy |
| Subclass CT |
Biography |
| Class D |
WORLD HISTORY AND HISTORY OF EUROPE,
ASIA, AFRICA, AUSTRALIA, NEW ZEALAND, ETC. |
| Subclass D |
History (General) |
| Subclass DA |
Great Britain |
| Subclass DS |
Asia History |
| Subclass DT |
African History |
| Subclass DU |
Oceania History |
| Class E-F |
HISTORY OF THE AMERICAS |
| Class E |
America/United States |
| Class F |
British America, Latin America, Dutch America, French America, U.S. Local History |
| Class G |
GEOGRAPHY. ANTHROPOLOGY. RECREATION |
| Subclass G |
Geography (General). Atlases. Maps |
| Subclass GE |
Environmental Sciences |
| Subclass GN |
Anthropology |
| Subclass GR |
Folklore |
| Subclass GT |
Manners and customs (General) |
| Subclass GV |
Recreation. Leisure |
| Class H |
SOCIAL SCIENCES |
| Subclass H |
Social sciences (General) |
| Subclass HG |
Finances |
| Subclass HM |
Sociology (General) |
| Subclass HN |
Social history and conditions. Social problems. Social reform |
| Subclass HV |
Social pathology. Social and public welfare. Criminology |
| Subclass HX |
Socialism. Communism. Anarchism |
| Subclass BC |
Logic |
| Subclass BD |
Speculative philosophy |
| Subclass BH |
Aesthetics |
| Subclass BJ |
Ethics |
| Subclass BL |
Religions. Mythology. Rationalism |
| Subclass BM |
Judaism |
| Subclass BP |
Islam. Bahaism. Theosophy, etc. |
| Subclass BQ |
Buddhism |
| Subclass BS |
The Bible |
| Subclass BT |
Doctrinal Theology |
| Subclass BV |
Practical Theology |
| Subclass CC |
Archaeology |
| Subclass CD |
Diplomatics. Archives. Seals |
| Subclass CE |
Technical Chronology. Calendar |
| Subclass CJ |
Numismatics |
| Subclass CN |
Inscriptions. Epigraphy |
| Subclass CR |
Heraldy |
| Subclass DAW |
Central Europe |
| Subclass DB |
Austria - Liechtenstein - Hungary - Czechoslovakia |
| Subclass DC |
France - Andorra - Monaco |
| Subclass DD |
Germany |
| Subclass DE |
Greco-Roman World |
| Subclass DF |
Greece |
| Subclass DG |
Italy - Malta |
| Subclass DH |
Low Countries - Benelux Countries |
| Subclass DJ |
Netherlands |
| Subclass DJK |
Eastern Europe (General) |
| Subclass DK |
Russia. Soviet Union. Former Soviet Republics - Poland |
| Subclass DL |
Northern Europe. Scandinavia |
| Subclass DP |
Spain - Portugal |
| Subclass DQ |
Switzerland |
| Subclass DR |
Balkan Peninsula |
| Subclass DX |
Romanies |
| Subclass GA |
Mathematical geography. Cartography |
| Subclass GB |
Physical geography |
| Subclass GC |
Oceanography |
| Subclass GF |
Human ecology. Anthropogeography |
| Subclass GT |
Manners and customs (General) |
| Subclass HA |
Statistics |
| Subclass HB |
Economic theory. Demography |
| Subclass HC |
Economic history and conditions |
| Subclass HD |
Industries. Land use. Labor |
| Subclass HE |
Transportation and communications |
| Subclass HF |
Commerce |
| Subclass HJ |
Public finance |
| Subclass HQ |
The family. Marriage. Women |
| Subclass HS |
Societies: secret, benevolent, etc. |
| Subclass HT |
Communities. Classes. Races |
| Class J |
POLITICAL SCIENCE |
| Subclass JA |
Political science (General) |
| Subclass J |
General legislative and executive papers |
| Subclass JC |
Political theory |
| Subclass JF |
Political institutions and public administration |
| Subclass JJ |
Political institutions and public administration (North America) |
| Subclass JK |
Political institutions and public administration (United States) |
| Subclass JL |
Political institutions and public administration (Canada, Latin America, etc.) |
| Subclass JN |
Political institutions and public administration (Europe) |
| Subclass JQ |
Political institutions and public administration (Asia, Africa, Australia, Pacific Area, etc.) |
| Subclass JS |
Local government. Municipal government |
| Subclass JV |
Colonies and colonization. Emigration and immigration. International migration |
| Subclass JX |
International law, see JZ and KZ |
| Subclass JZ |
International relations |
| Class K |
LAW |
| Subclass K |
Law in general. Comparative and uniform law. Jurisprudence |
| Subclass KB |
Religious law in general. Comparative religious law. Jurisprudence |
| Subclass KBM |
Jewish law
|
| Subclass KBP |
Islamic law |
| Subclass KBR |
History of canon law |
| Subclass KBU |
Law of the Roman Catholic Church. The Holy See |
| Subclass KD-KDK |
United Kingdom and Ireland |
| Subclass KDZ |
America. North America |
| Subclass KE |
Canada |
| Subclass KF |
United States |
| Subclass KG |
Latin America - Mexico and Central America -
West Indies. Caribbean area |
| Subclass KH |
South America |
| Subclass KJ-KKZ |
Europe |
| Subclass KL-KWX |
Asia and Eurasia, Africa, Pacific Area, and Antarctica |
| Subclass KZ |
Law of nations |