Dewey Classification 15,617
Government Document 30,492
- British 280
- California 3,549
- Federal 17,159
- International 3,504
- Other 6,646
LC Classification 5,578,083 [remove]
- A - General Works 65,989
  - A - General Works 379
  - AC - Collections, Series, Collected Works 49,510
  - AE - Encyclopedias 947
  - AG - Dictionaries & Other General Reference Works 635
  - AI - Indexes 282
  - AM - Museums, Collectors & Collecting 2,402
  - AN - Newspapers 4
  - AP - Periodicals 454
  - AS - Academies & Learned Societies 7,931
  - AY - Yearbooks, Almanacs, Directories 1,893
  - AZ - History of Scholarship & Learning. The Humanities 1,546
- B - Philosophy, Psychology, Religion 408,546
  - B - Philosophy, Psychology, Religion 67,825
  - BC - Logic 2,839
  - BD - Speculative Philosophy 10,701
  - BF - Psychology, Parapsychology, Occult Sciences 37,797
  - BH - Aesthetics 3,548
  - BJ - Ethics, Social Usages, Etiquette 11,941
  - BL - Religions, Mythology, Rationalism 34,323
  - BM - Judaism 34,005
  - BP - Islam, Bahaism, Theosophy, etc. 37,904
  - BQ - Buddhism 15,141
  - BR - Christianity 27,364
  - BS - The Bible 28,707
  - BT - Doctrinal Theology 16,083
  - BV - Practical Theology 17,179
  - BX - Christian Denominations 63,224
- C - Auxiliary Sciences of History 45,993
  - C - Auxiliary Sciences of History 1,416
  - CB - History of Civilization 6,965
  - CC - Archaeology 3,844
  - CD - Diplomatics, Archives, Seals 6,139
  - CE - Technical Chronology, Calendar 642
  - CJ - Numismatics 4,203
  - CN - Inscriptions, Epigraphy 1,397
  - CR - Heraldry 2,485
  - CS - Genealogy 6,255
  - CT - Biography 12,648
- D - History (General) 763,614
  - D - History (General) 107,734
  - DA - Great Britain (History) 41,179
  - DAW - Central Europe (History) 392
  - DB - Austria, Liechtenstein, Hungary, Czechoslovakia, Czech Republic, Slovakia (History) 22,085
  - DC - France (History) 37,182
  - DD - Germany (History) 45,010
  - DE - Greco-Roman World (History) 2,033
  - DF - Greece (History) 7,756
  - DG - Italy, Malta (History) 31,621
  - DH - Low Countries, Belgium, Luxembourg (History) 2,016
  - DJ - Netherlands (Holland) (History) 1,076
  - DJK - Eastern Europe (General History) 2,158
  - DK - Russia, Soviet Union, Former Soviet Republics, Poland (History) 109,532
  - DL - Northern Europe, Scandinavia (History) 3,294
  - DP - Spain. Portugal (History) 18,297
  - DQ - Switzerland (History) 2,786
  - DR - Balkan Peninsula (History) 33,524
  - DS - Asia (History) 221,303
  - DT - Africa (History) 69,048
  - DU - Oceania (South Seas) (History) 4,996
  - DX - Romanies (Gypsies) (History) 852
- E - America, United States (General History) 79,045
  - E - America, United States (General History) 79,045
- F - United States, British, Dutch, French, Latin America (Local History) 137,518
  - F - United States, British, Dutch, French, Latin America (Local History) 137,495
- G - Geography, Atlases, Globes, Maps 110,344
  - G - Geography, Atlases, Globes, Maps 18,334
  - GA - Mathematical Geography, Cartography 2,139
  - GB - Physical Geography 6,550
  - GC - Oceanography 3,643
  - GE - Environmental Sciences 6,612
  - GF - Human Ecology, Anthropogeography 3,768
  - GN - Anthropology 23,752
  - GR - Folklore 11,587
  - GT - Manners & Customs 10,902
  - GV - Recreation. Leisure 23,060
- H - Social Sciences (General) 791,191
  - H - Social Sciences (General) 15,903
  - HA - Statistics 9,133
  - HB - Economic Theory, Demography 36,620
  - HC - Economic History & Conditions 111,686
  - HD - Industries, Land use, Labor 187,215
  - HE - Transportation & Communications 24,470
  - HF - Commerce 59,755
  - HG - Finance 46,392
  - HJ - Public Finance 15,960
  - HM - Sociology 28,056
  - HN - Social History & Conditions 37,825
  - HQ - Family, Marriage, Gender & Sexuality 71,986
  - HS - Societies: Secret, Benevolent, etc. 3,560
  - HT - Communities, Classes, Races 26,335
  - HV - Social Pathology, Social & Public Welfare, Criminology 74,275
  - HX - Socialism, Communism, Utopias, Anarchism 42,239
- J - Political Science (Legislative & Executive papers) 196,319
  - J - Political Science (Legislative & Executive papers) 2,492
  - JA - Political Science (General) 9,147
  - JC - Political Theory 30,673
  - JF - Political Institutions & Public Administration (General) 7,254
  - JJ - Political Institutions & Public Administration (North America) 6
  - JK - Political Institutions & Public Administration (U.S.) 12,719
  - JL - Political Institutions & Public Administration (Canada, Latin America) 12,746
  - JN - Political Institutions & Public Administration (Europe) 36,666
  - JQ - Political Institutions & Public Administration (Asia, Africa, Australia, Pacific Area) 28,713
  - JS - Local Government, Municipal Government 9,981
  - JV - Colonies & Colonization, Emigration & Immigration 11,793
  - JX - International Law 20,327
  - JZ - International Relations 13,814
- K - Law 230,708
  - K - Law 39,316
  - KB - Religious Law (General) 102
  - KBM - Jewish Law 416
  - KBP - Islamic Law 5,017
  - KBR - History of Canon law 434
  - KBS - Canon law of Eastern churches 13
  - KBT - Canon law of Eastern Rite Churches in Communion with the Holy See of Rome 4
  - KBU - Law of the Roman Catholic Church. The Holy See 532
  - KD - Law of England & Wales 14,345
  - KDC - Law of Scotland 1,374
  - KDE - Law of Northern Ireland 81
  - KDG - Law of Isle of Man, Channel Islands 18
  - KDK - Law of Ireland (EIRE) 485
  - KDZ - Law of America, North America 627
  - KE - Law of Canada 3,049
  - KEA - Law of Alberta 135
  - KEB - Law of British Columbia 143
  - KEM - Law of Manitoba 67
  - KEN - Law of New Brunswick, Newfoundland, Northwest Territories, Nova Scotia 65
  - KEO - Law of Ontario 174
  - KEP - Law of Prince Edward Island 4
  - KEQ - Law of Quebec 191
  - KES - Law of Saskatchewan 42
  - KEZ- Law of Individual Canadian cities 2
  - KF - Law of the U.S. 62,222
  - KFA - Law of Alabama, Alaska, Arizona, Arkansas 317
  - KFC - Law of California, Colorado, Connecticut 5,477
  - KFD - Law of Delaware, District of Columbia 179
  - KFF - Law of Florida 147
  - KFG - Law of Georgia 132
  - KFH - Law of Hawaii 158
  - KFI - Law of Idaho, Illinois, Indiana, Iowa 565
  - KFK - Law of Kansas, Kentucky 247
  - KFL - Law of Louisiana 260
  - KFM - Law of Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana 1,012
  - KFN - Law of Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota 1,786
  - KFO - Law of Ohio, Oklahoma, Oregon 324
  - KFP - Law of Pennsylvania 240
  - KFR - Law of Rhode Island 50
  - KFS - Law of South Carolina, South Dakota 133
  - KFT - Law of Tennessee, Texas 424
  - KFU - Law of Utah 63
  - KFV - Law of Vermont, Virginia 267
  - KFW - Law of Washington, West Virginia, Wisconsin, Wyoming 347
  - KFX - Law of Individual U.S. cities 413
  - KFZ - Law of Northwest Territory, Confederate States of America 17
  - KG - Law of Latin America 1,081
  - KGA - Belize 10
  - KGB - Law of Costa Rica 235
  - KGC - Law of El Salvador 125
  - KGD - Law of Guatemala 360
  - KGE - Law of Honduras 91
  - KGF - Law of Mexico 3,117
  - KGG - Law of Nicaragua 195
  - KGH - Law of Panama, Panama Canal Zone 171
  - KGJ - Law of Caribbean area (General), Anguilla 60
  - KGK - Law of Antigua and Barbuda, Aruba 1
  - KGL - Law of Bahamas, Barbados, British Leeward Islands, British Virgin Islands, British West Indies, British Windward Islands, West Indies (Federation) 63
  - KGM - Law of the Cayman Islands 3
  - KGN - Law of Cuba 225
  - KGP - Law of Curaçao, Dominica 4
  - KGQ - Law of the Dominican Republic 64
  - KGR - Law of Dutch Leeward Islands, Dutch West Indies (Netherlands Antilles), Dutch Windward Islands, French West Indies, Grenada 13
  - KGS - Law of Haiti 114
  - KGT - Law of Jamaica, Martinique, Montserrat 17
  - KGV - Law of Puerto Rico 81
  - KGW - Law of Saba - Saint Christopher (Saint Kitts), Nevis, and Anguilla - Saint Lucia - Saint Vincent and the Grenadines - Sint Eustatius -Sint Maarten 5
  - KGX - Law of Trinidad and Tobago 9
  - KGZ - Law of Virgin Islands of the United States 2
  - KH - Law of South America 173
  - KHA - Law of Argentina 730
  - KHC - Law of Bolivia 877
  - KHD - Law of Brazil 1,826
  - KHF - Law of Chile 986
  - KHH - Law of Colombia 1,659
  - KHK - Law of Ecuador 529
  - KHL - Law of Falkland Islands 1
  - KHN - Law of Guyana 21
  - KHP - Law of Paraguay 55
  - KHQ - Law of Peru 662
  - KHS - Law of Suriname 2
  - KHU - Law of Uruguay 221
  - KHW - Law of Venezuela 1,010
  - KI - Law of indigenous peoples 2
  - KIA - Law of indigenous peoples of the Americas 2
  - KIB - Law of indigenous peoples: Canada (General) 6
  - KIC - Law of indigenous peoples: Canada—Eastern 3
  - KID - Law of indigenous peoples: Canada—Western 1
  - KIE - Law of indigenous peoples: United States (General) 19
  - KIF - Law of indigenous peoples: United States—Northeast Atlantic 2
  - KIG - Law of indigenous peoples: United States—South 4
  - KIH - Law of indigenous peoples: United States—North Central 7
  - KIK - Law of indigenous peoples: United States—New Southwest 2
  - KJ - History of law: Europe 394
  - KJA - Roman Law 1,771
  - KJC - Europe: Regional Comparative & Uniform Law 3,724
  - KJE - Europe: Regional Organization & Integration 5,451
  - KJG - Law of Albania 36
  - KJH - Law of Andorra 3
  - KJJ - Law of Austria 645
  - KJK - Law of Belgium, Bosnia and Hercegovina (Federation), Republika Srpska 176
  - KJM - Law of Bulgaria, Croatia (Kingdom), Croatia (1992- ) 220
  - KJN - Law of Cyprus 23
  - KJP - Law of Czechoslovakia (to 1993), Czech Republic (1993- ) 236
  - KJQ - Law of Slovakia (1993- ) 24
  - KJR - Law of Denmark 76
  - KJS - Law of Estonia 71
  - KJT - Law of Finland 84
  - KJV - Law of France 4,067
  - KJW - Law of French Regions, Provinces, Departments 131
  - KK - Law of Germany 5,906
  - KKA - Law of East Germany 275
  - KKB - Law of German states and provinces (A-Pr) 220
  - KKC - Law of German states and provinces (Ps-Z) 147
  - KKE - Law of Greece 75
  - KKF - Law of Hungary 236
  - KKG - Law of Iceland 12
  - KKH - Law of Italy, Kosovo 3,532
  - KKI - Law of Latvia 113
  - KKJ - Law of Liechtenstein, Lithuania 118
  - KKK - Law of Luxemburg, Macedonia (Republic) (1992- ), Malta 31
  - KKL - Law of Monaco, Montenegro 10
  - KKM - Law of the Netherlands 236
  - KKN - Law of Norway 56
  - KKP - Law of Poland 989
  - KKQ - Law of Portugal 143
  - KKR - Law of Romania 251
  - KKS - Law of San Marino, Serbia (Kingdom), Serbia (2006- ), Slovenia (1992- ) 53
  - KKT - Law of Spain 1,494
  - KKV - Law of Sweden 256
  - KKW - Law of Switzerland 829
  - KKX - Law of Turkey 624
  - KKY - Law of Ukraine 417
  - KKZ - Law of Yugoslavia. Serbia and Montenegro (to 2006) 388
  - KL - History of Law, The Ancient Orient 371
  - KLA - Law of Russia, Soviet Union 1,331
  - KLB - Law of Russia (Federation, 1992- ) 1,559
  - KLD - Law of Armenian SSR (to 1991) 14
  - KLE - Law of Azerbaijan 61
  - KLF - Law of Belarus (Republic) 208
  - KLH - Law of Georgia (Republic) 43
  - KLM - Law of Moldova 132
  - KLN - Law of Russian S.F.S.R. (to 1991) 47
  - KLP - Law of Ukraine (1919-1991), Zakavkazskaia͡ Sots͡ialisticheskaia͡ Federativnaia͡ Sovetskaia͡ Respublika (to 1936) 89
  - KLR - Law of Kazakhstan 186
  - KLS - Law of Kyrgyzstan 105
  - KLT - Law of Tajikistan 47
  - KLV - Law of Turkmenistan 19
  - KLW - Law of Uzbekistan 133
  - KM - Law of Asia 184
  - KMC - Law of the Middle East, Southwest Asia: Regional comparative and uniform law 261
  - KME - Middle East. Southwest Asia: Regional comparative and uniform law: Regional organization and integration 2
  - KMF - Law of Armenia (Republic), Bahrain 27
  - KMG - Law of Gaza 5
  - KMH - Law of Iran 197
  - KMJ - Law of Iraq 88
  - KMK - Law of Israel 517
  - KML - Law of Jerusalem 20
  - KMM - Law of Jordan, West Bank 95
  - KMN - Law of Kuwait 34
  - KMP - Law of Lebanon 158
  - KMQ - Law of Oman, Palestine (to 1948) 36
  - KMS - Law of Qatar 3
  - KMT - Law of Saudi Arabia 66
  - KMU - Law of Syria 25
  - KMV - Law of United Arab Emirates 19
  - KMX - Law of Yemen 19
  - KMY - Law of Yemen (People's Democratic Republic) (to 1990) 3
  - KNC - Asia (South Asia. Southeast Asia. East Asia): Regional comparative and uniform law 448
  - KNE - Asia (South Asia. Southeast Asia. East Asia): Regional organization and integration 21
  - KNF - Afghanistan 161
  - KNG - Law of Bangladesh 48
  - KNH - Law of Bhutan 13
  - KNK - Law of Brunei 1
  - KNL - Law of Burma 26
  - KNM - Law of Cambodia 25
  - KNN - Law of China 1,172
  - KNP - Law of Taiwan 287
  - KNQ - Law of China (People's Republic, 1949- ) 3,117
  - KNR - Law of Hong Kong (to 1997) 213
  - KNS - Law of India 1,884
  - KNT - Law of India: States and union territories (A-L) 45
  - KNU - Law of India: States and union territories (M-Z) 43
  - KNV - Law of French Indochina. Indochina (Federation) 1
  - KNW - Law of Indonesia, East Timor 166
  - KNX - Law of Japan 2,242
  - KNY - Law of Japan: Cities, communities, etc. 3
  - KPA - Law of Korea. South Korea 785
  - KPC - Law of Democratic People's Republic of Korea. North Korea 77
  - KPE - Law of Laos 7
  - KPF - Law of Macau (to 1999) 19
  - KPG - Law of Malaysia. States of East and West Malaysia (1957- ) (Part 1) 113
  - KPH - Law of Malaysia: States of East and West Malaysia (1957- ) (Part 2) 4
  - KPJ - Law of Mongolia 23
  - KPK - Law of Nepal 50
  - KPL - Law of Pakistan 207
  - KPM - Law of the Philippines 358
  - KPP - Law of Singapore 69
  - KPS - Law of Sri Lanka 97
  - KPT - Law of Thailand 46
  - KPV - Law of Vietnam 36
  - KPW - Law of Vietnam (Republic). South Vietnam 4
  - KQ - Law of Africa 80
  - KQC - Africa: Regional comparative and uniform law 1,010
  - KQE - Africa: Regional organization and integration 68
  - KQG - Law of Algeria 145
  - KQH - Law of Angola 91
  - KQJ - Law of Benin 78
  - KQK - Law of Botswana 121
  - KQM - Law of British Central Africa Protectorate 1
  - KQP - Law of British Indian Ocean Territory, British Somaliland 4
  - KQT - Law of Burkina Faso 44
  - KQV - Law of Burundi 43
  - KQW - Law of Cameroon 203
  - KQX - Law of Cape Verde 28
  - KRB - Law of Central African Republic 17
  - KRC - Law of Chad 22
  - KRE - Law of Comoros 12
  - KRG - Law of Congo (Brazzaville) 34
  - KRK - Law of Djibouti 14
  - KRL - Law of East Africa Protectorate 26
  - KRM - Law of Egypt (United Arab Republic) 401
  - KRN - Law of Eritrea 17
  - KRP - Law of Ethiopia 117
  - KRR - Law of French Equatorial Africa 2
  - KRS - Law of French West Africa 31
  - KRU - Law of Gabon 41
  - KRV - Law of Gambia 23
  - KRW - Law of German East Africa 1
  - KRX - Law of Ghana 198
  - KRY - Law of Gibraltar 2
  - KSA - Law of Guinea 31
  - KSC - Law of Guinea-Bissau 37
  - KSE - Law of Equatorial Guinea, Ifni 6
  - KSG - Law of Italian East Africa, Italian Somaliland 1
  - KSH - Law of Côte d'Ivoire 69
  - KSK - Law of Kenya 370
  - KSL - Law of Lesotho 72
  - KSN - Law of Liberia 27
  - KSP - Law of Libya 18
  - KSR - Law of Madagascar 83
  - KSS - Law of Malawi 152
  - KST - Law of Mali 32
  - KSU - Law of Mauritania 19
  - KSV - Law of Mauritius, Mayotte 36
  - KSW - Law of Morocco 305
  - KSX - Law of Mozambique 178
  - KSY - Law of Namibia 193
  - KSZ - Law of Niger 27
  - KTA - Law of Nigeria 836
  - KTC - Law of Réunion 3
  - KTD - Law of Rwanda 108
  - KTE - Law of Saint Helena 2
  - KTF - Law of Sao Tome and Principe 8
  - KTG - Law of Senegal 190
  - KTH - Law of Seychelles 22
  - KTJ - Law of Sierra Leone 28
  - KTK - Law of Somalia 20
  - KTL - Law of South Africa, Republic of 1,319
  - KTM - Law of South Sudan (2011- ) 3
  - KTQ - Law of Sudan 79
  - KTR - Law of Swaziland 45
  - KTT - Law of Tanzania 242
  - KTU - Law of Togo 45
  - KTV - Law of Tunisia 103
  - KTW - Law of Uganda 275
  - KTX - Law of Congo (Democratic Republic) 212
  - KTY - Law of Zambia, Zanzibar (to 1964) 167
  - KTZ - Law of Zimbabwe 247
  - KU - Law of Australia 1,510
  - KUA - Law of Australian Capital Territory 6
  - KUB - Law of Northern Territory 6
  - KUC - Law of New South Wales 192
  - KUD - Law of Queensland 58
  - KUE - Law of South Australia 12
  - KUF - Law of Tasmania 34
  - KUG - Law of Victoria 59
  - KUH - Law of Western Australia 166
  - KUQ - Law of New Zealand 327
  - KVB - Law of Pacific area jurisdictions: Regional comparative and uniform law: Australia and New Zealand 24
  - KVC - Law of Pacific area jurisdictions: Regional comparative and uniform law: Other Pacific area jurisdictions (Australasia, Oceania) 57
  - KVE - Law of Pacific area jurisdictions: Regional comparative and uniform law: Regional organization and integration. Pacific area cooperation 1
  - KVH - Law of American Samoa, British New Guinea (Territory of Papua) 2
  - KVN - Law of Fiji 9
  - KVP - Law of French Polynesia (Including the island groups of Austral, Society (Tahiti), Tuamotu, Gambier, and Marquesas), German New Guinea (to 1914) 7
  - KVQ - Law of Guam 25
  - KVR - Law of Kiribati (Including Gilbert, Phoenix, and Line Islands) 2
  - KVS - Law of Marshall Islands, Micronesia (Federated States), Midway Islands 3
  - KVU - Law of Nauru, Netherlands New Guinea (to 1963) 3
  - KVW - Law of New Caledonia 5
  - KWA - Law of Niue 1
  - KWC - Law of Northern Mariana Islands 3
  - KWE - Law of Pacific Islands (Trust Territory) 2
  - KWG - Law of Palau 1
  - KWH - Law of Papua New Guinea 53
  - KWL - Law of Pitcairn Island, Solomon Islands 3
  - KWQ - Law of Tuvalu 2
  - KWR - Law of Vanuatu 3
  - KWW - Law of Samoa 3
  - KWX - Law of Antarctica 85
  - KZ - Law of Nations 10,255
  - KZA - Law of the sea 1,027
  - KZD - Law of outer space 357
- L - Education 131,077
  - L - Education 14,513
  - LA - History of Education 24,569
  - LB - Theory & Practice of Education 50,303
  - LC - Special Aspects of Education 31,331
  - LD - Individual Educational Institutions: United States 2,089
  - LE - Individual Educational Institutions: America (except U.S.) 1,362
  - LF - Individual Educational Institutions: Europe 4,456
  - LG - Individual Educational Institutions: Asia, Africa, Oceania 2,207
  - LH - College & School Magazines & Papers 23
  - LJ - Student Fraternities & Societies (U.S.) 64
  - LT - Textbooks 176
- M - Music 103,492
  - M - Music 4,763
  - ML - Literature on Music 89,738
  - MT - Musical Instruction & Study 8,992
- N - Visual Arts 271,914
  - N - Visual Arts 97,900
  - NA - Architecture 42,718
  - NB - Sculpture 14,283
  - NC - Drawing, Design, Illustration 15,395
  - ND - Painting 61,794
  - NE - Print Media 8,447
  - NK - Decorative Arts, Applied Arts, Decoration & Ornament 21,321
  - NX - Arts in General 10,085
- P - Philology, Linguistics (General) 1,332,216
  - P - Philology, Linguistics (General) 48,871
  - PA - Classical Philology, Greek & Latin Languages & Literatures 32,145
  - PB - Modern Languages, Celtic Languages 2,291
  - PC - Romance Philology & Languages 20,954
  - PD - Germanic Philology & Languages 1,946
  - PE - English Philology & Language 12,821
  - PF - West Germanic Philology & Languages 6,376
  - PG - Slavic, Baltic, Albanian Languages & Literatures 138,375
  - PH - Uralic, Basque Languages & Literatures 6,289
  - PJ - Oriental Philology & Literature 66,421
  - PK - Indo-Iranian Philology & Literature 17,948
  - PL - Languages & Literatures of Eastern Asia, Africa, Oceania 115,967
  - PM - Hyperborean, Indian & Artificial Languages 5,840
  - PN - Literature (General) & Journalism 152,771
  - PQ - French, Italian, Spanish & Portuguese Literature 302,202
  - PR - English Literature 156,655
  - PS - American & Canadian Literatures 133,848
  - PT - German & Germanic Literatures 82,031
  - PZ - Fiction & Children's Literature 28,797
- Q - Science (General) 350,761
  - Q - Science (General) 31,833
  - QA - Mathematics 107,669
  - QB - Astronomy 12,578
  - QC - Physics 42,524
  - QD - Chemistry 22,345
  - QE - Geology 26,985
  - QH - Natural History, Biology 36,113
  - QK - Botany 12,787
  - QL - Zoology 23,640
  - QM - Human Anatomy 2,393
  - QP - Physiology 24,425
  - QR - Microbiology 7,563
- R - Medicine (General) 151,121
  - R - Medicine (General) 23,559
  - RA - Public Aspects of Medicine 30,356
  - RB - Pathology 3,445
  - RC - Internal Medicine 54,063
  - RD - Surgery 9,742
  - RE - Ophthalmology 2,361
  - RF - Otorhinolaryngology 1,110
  - RG - Gynecology & Obstetrics 5,571
  - RJ - Pediatrics 7,348
  - RK - Dentistry 720
  - RL - Dermatology 1,126
  - RM - Therapeutics, Pharmacology 5,514
  - RS - Pharmacy & Materia Medica 3,018
  - RT - Nursing 2,683
  - RV - Botanic, Thomsonian, & Eclectic Medicine 28
  - RX - Homeopathy 182
  - RZ - Other Systems of Medicine 292
- S - Agriculture (General) 36,017
  - S - Agriculture (General) 11,597
  - SB - Plant Culture 10,748
  - SD - Forestry 4,345
  - SF - Animal Culture 4,316
  - SH - Aquaculture, Fisheries, Angling 3,915
  - SK - Hunting Sports 1,095
- T - Technology (General) 216,167
  - T - Technology (General) 14,953
  - TA - Engineering, Civil Engineering 34,925
  - TC - Hydraulic Engineering 3,900
  - TD - Environmental Technology, Sanitary Engineering 15,625
  - TE - Highway Engineering, Roads & Pavements 1,004
  - TF - Railroad Engineering & Operation 1,837
  - TG - Bridge Engineering 829
  - TH - Building Construction 4,193
  - TJ - Mechanical Engineering & Machinery 12,575
  - TK - Electrical Engineering, Electronics, Nuclear Engineering 41,426
  - TL - Motor Vehicles, Aeronautics, Astronautics 18,230
  - TN - Mining Engineering, Metallurgy 10,190
  - TP - Chemical Technology 13,509
  - TR - Photography 20,131
  - TS - Manufactures 8,309
  - TT - Handicrafts. Arts & Crafts 2,215
  - TX - Home Economics 12,321
- U - Military Science (General) 43,508
  - U - Military Science (General) 13,115
  - UA - Armies 16,057
  - UB - Military Administration 5,326
  - UC - Maintenance & Transportation 868
  - UD - Infantry 435
  - UE - Cavalry, Armor 238
  - UF - Artillery 1,083
  - UG - Military Engineering, Air Forces, Military Astronautics 5,802
  - UH - Other Military Services 603
- V - Naval Science (General) 9,321
  - V - Naval Science (General) 2,951
  - VA - Navies 2,007
  - VB - Naval Administration 265
  - VC - Naval Maintenance 68
  - VD - Naval Personnel 14
  - VE - Marines 213
  - VF - Naval Ordnance 55
  - VG - Minor Services of Navies 246
  - VK - Navigation, Merchant Marine 1,629
  - VM - Naval Architecture, Marine Engineering 1,872
- Z - Bibliography, Library Science, Information Resources 105,908
  - Z - Bibliography, Library Science, Information Resources 104,950
  - ZA - Information Resources (General) 957