Keyword Guide to Library of Congress Classification Letters
Can't find your topic in the Library of Congress Classification Schedule?
Look up your keyword on this list to locate the one- or two-letter classification code.
Use this two-letter code to browse the shelves in the Reference Collection (first floor) or the Circulating Collection (second floor).
Abortion RG
Academic freedom LC
Academics and learned societies (general) AS
Acquired Immune Deficiency Syndrome QR
Adolescent Suicide HV
Adoption HV
Aeronautics TL
Aesthetics BH
Affirmative action HF
Affordable housing HD
Africa, history DT
Africa, political science JQ
African-Americans, history E 184.5-185.98
Aging QH
Agriculture, general S
AIDS, disease QR
AIDS, drugs RJ
Air forces UG
Air Pollution TD
Air warfare UG
Alcohol abuse HV
Almanacs, general AY
Alternative energy TJ
Alternative fuels TP
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Alternative medicine R
America, ethnicities E 184-185.98
America, late nineteenth century E 660-738
America, twentieth century E 740-
American history, general E 11-29
Anarchism HX
Animal behavior QL
Animal culture SF
Animal rights HV
Anthropology GN
Antibiotics RM
Anxiety, psychological aspects BF
Anxiety, phsysiological aspects RC
Aquaculture SH
Archaeology (general) CC
Architecture NA
Archives CD
Armies: organization, description, facilities, etc. UA
Arms control JZ
Arts and crafts TT
Arts in general NX
Asia, history DS
Asia, political science JQ
Assisted suicide R
Astronautics TL
Astronomy QB
Atlases G
Australia, political science JQ
Autism RC
Avian Flu SF
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Bahaism (religion) BP
Balkan Peninsula, history DR
Bias JC
Bible BS
Bibliography Z 1001-8999
Bilingual education LC
Bioethics QH
Biography CT
Biofuels TP
Biology (general) QH
Biotech foods TP
Bird Flu SF
Birds QL
Birth Control HQ
Body Image BF
Book industries and trade Z116-659
Bookmaking Z 4-8
Books, history Z 4-8
Botanical medicine RV
Botany QK
British America F 1001-1140
British America, political science JL
Buddhism BQ
Building construction TH
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Campaign Finance Reform JK
Canada F 1001-1140
Cancer RC
Careers HF
Cartography GA
Cavalry, armored and mechanized UE
Censorship Z
Central America, F 1201 -- 2191
Charter schools LB
Chemical and Biological Weapons UG
Chemistry QD
Child Abuse, social aspects HV
Child Abuse, Psychiatry RC
Child Care, costs HQ
Child Care, options HQ
Child Labor HD
Childhood obesity R
Children in Crises HV
Christian denominations BX
Christianity BR
Cigarette smoking HV
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Civil Rights and Liberties, Political aspects JC
Civil Rights and Liberties, Legal aspects JC
Civil engineering (general) TA
Civil War, U.S. E 456-655
Civilization, history CB
Classes of people (Sociology) HT
Climate change QC
Cloning QH
Coal Mining Safety L
Collected works (general) AC
Collecting (general) AM
College and school magazines and papers LH
College Costs LB
College Funding LB
Colonial history, U.S. E 186-199
Colonies and colonization JV
Commerce HF
Communications HE
Communism HX
Communities HT
Computer Crime HV
Computer Literacy AQ
Confederate States of America E 482 489
Conservation, biology QH
Constitution, United States JK
Consumerism HF
Constitutional history and administration, general works JF
Contraception RG
Copywright issues RG
Costumes GT
Creationism BS
Criminology HV
Cyber-predators HV
Cyber-crime HV
Cyber-security HV
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Death penalty, Moral Issues BJ
Death Penalty HV
Decoration and ornament NK
Decorative and Applied Arts NK
Democracy JC
Demography HB
Dental Hygiene RK
Dentistry RK
Depression, mental illness RC
Dermatology RL
Design NC
Dictionaries (general) AG
Dieting and health RA
Diplomatics CD
Directories (general) AY
Discovery of America E 101-135
Discrimination, Age HB
Discrimination, EmploymentHD
Discrimination, Housing HD
Discrimination, Race HV
Discrimination, Religious KF
Discrimination, Sex HD
Domestic Partners HQ
Drawing NC
Drug and Alcohol abuse HV
Drug-resistant bacteria QR
Drug Company Ethics HF
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Early exploration of America E 101-135
Earth Day HC
Earthquakes QE
Eastern Europe, history DJ
Eating disorders RC
Economic history and conditions HC-HD
Economic theory HB
Ecotourism G
Education (general) L
Education, history LA
Education, special aspects LC
Education, theory and practice LB
Elderly RC
Elderly, social aspects HV
Election Reform JK
Electrical engineering TK
Electronics TK
Emigration JV
Employment discrimination HD
Encyclopedias (general) AE
Endangered Species QL
Energy TJ
Energy Policy HD
Engineering (general) TA
English PE
Environmental studies GE
Environmental technology TD
ESL (English as a Second Language) LB
Ethics BJ
Ethics of War BJ
Etiquette BJ
Europe, political science JN
Euthanasia R
Evolution DC
Executive Power JK
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Farm Subsidies HD
Feminism HQ
Finance HG
Finance Reform, campaign JK
Fine arts, general N
First amendment JC
Fisheries SH
Flood control GB
Floods, relief work HV
Folklore GR
Food safety RA
Forestry SD
France, history DC
Free speech JC
Freedom of the press, legal aspects K
Freedom of the press, social aspects HN
Funding College LB
Free speech JC
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GLBT (Gay, Lesbian, Bisexual and Transgender) Rights HQ
Gambling, Games GV
Gambling, Illegal HV
Gay marriage HQ
Gay rights HQ
Gender Equity HD
Gender Identity Disorders RC
Genealogy CE
Genetically Modified Foods TP
Geography, mathematical GA
Geography, physical GB
Geology QE
Germany, history DD
GLBT (Gay, Lesbian, Bisexual and Transgender) Rights HQ
Glass Ceiling HF
Global Economy HF
Global Jihad DS
Global Warming QC
Government, local JS
Government secrecy JK
Great Britain, history DA
Greco-Roman World, history D
Greece, history DF
Gun control HV
Gynecology RG
Gypsies, history DX
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Handicrafts TT
Hate crimes HV
Hazardous wasteTD
Health RA
Health care reform RJ
Health insurance HB
Heraldry CR
Herbicides SB
Highway engineering TE
History (general) D
History of scholarship and learning AZ
Holistic medicine R
Home economics TX
Home Schooling LC
Homeland security UA
Homelessness HV
Homeopathy RX
Human anatomy QM
Human ecology GF
Human genome research QH
Human rights, Political JC
Human rights, Legal K
Hunting SK
Hydraulic engineering TC
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Identity theft HV
Illegal immigrantsJV
Illustration NC
Immigration JV
Industry, social aspects HD
Indexes (general) Al
Indians of North America E 51-99
Infantry UD
Infertility RC
Inscriptions CN
Insurance, health HG, RA
Internal medicine RC
Internet TK
International law JX
International relations JX
Iran, History DS
Iraq DS
Iraqi War E 181
Islam (religion) BP
Israel DS
Italy, history DG
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Job Descriptions HF
Job Stress, physical aspects RC
Job Stress, social aspects HF
Job Training HD
Journalism PN
Judaism BM
Juvenile Crime, criminology HV
Juvenile Crime, psychiatry RJ
Kids in Prison HV
Languages and literatures, Classical PA
Languages, Germanic PD
Languages, Modern European PB
Languages, Other PF-PM
Languages, Romance PC
Latin America F 1201 2191
Latin America, political science JL
Law (general) K 1-7720
Law, America. North America KDZ 0-4999
Law, Canada KE
Law, Europe KJ
Law, Latin America KG
Law, South America KH
Law, United States KF
Learning disabilities LC
Leisure GV
Lesbian Marriage HQ
Lesbian Rights HQ
Libraries and library science Z 662-1000.5
Linguistics (general) P
Literature PN
Literature, American PS
Literature, English PR
Literature, Germanic PT
Literature, juvenile PZ
Literatures, Romance PQ
Logic BC
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Maintanance and transportation UC
Mammals QL
Manners and customs (General) GT
Manufactures TS
Maps G
Marriage HQ
Marriage Customs, Religious B
Marriage Customs, Social aspects GT
Marine engineering VM
Marines VE
Mathematics QA
Mechanical engineering and machinery TJ
Media, Influence P
Media and Sex P
Media and Violence HQ
Media and War P
Media bias P
Media Ownership P
Medicine (general) R
Medicine, practice of RC
Medicine, public aspects RA
Medicine, Thomsonian RV
Mental Health RA
Metallurgy TN
Methamphetamine, Medical aspects RC
Methamphetamine, Social aspects HV
Mexico F 1201 2191
Microbiology QR
Middle East DS
Military administration UB
Military engineering UG
Military science (General) U
Military services, other UH
Minimum Wage HD
Mining engineering TN
Mining Safety L
Monaco, history DC
Motor vehicles TL
Movies PN
Multicultural education LC
Museums (general) AM
Music M
Music, Literature ML
Musical instruction and study MT
Mythology BL
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NATO, History UA
NATO, Legal aspects JK
NATO, United States UG
Natural history (general) QH
Naval administration VB
Naval architecture VM
Naval science (general) V
Netherlands (Holland), history DJ
Netherlands (Low Countries), history DH
Newspapers AN
North America, history E 31-46
Northern Europe, history DL
Nuclear arms UA
Nuclear engineering TK
Nuclear proliferation JK
Numismatics CJ
Nursing RT
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Obesity RC
Obstetrics RG
Occupational training HD
Oceania (South Seas), history DU
Oceania, political science JQ
Oceanography GC
Oil Industry, Economics HD
Oil Industry, Technology TP
Old Age QH
Ophthalmology RE
Oregon, history Oregon, law KFO 2400-2999
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Painting ND
Palestine DS
Pathology RB
Patient’s Rights RA
Patriotism JK
Patriot Act, USA JK
Pediatrics RJ
Pedophilia RC
Periodicals (general) AP
Pesticides SB
Pharmacology RM
Pharmacy and materia medica RS
Philosophy (general) B
Photography TR
Physician-assisted suicide R
Physics QC
Physiology QP
Plageriasm PN
Plant culture SB
Political Science, collections and general works JA
Political theory JC
Pollution TD
Popular errors and delusions AZ
Portugal, history DP
Pregnancy RG
Presidential power JK
Print media NE
Privacy, Ethical aspects BF
Privacy, Right to JC
Prostitution HQ
Psychology BF
Public finance HJ
Public welfare HV
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Races HT
Racial Quotas HD
Racism HT
Railroad engineering and operation TF
Rationalism BL
Recreation GV
Recycling TD
Reference books (general) AG
Religion in the workplace BL
Religions BL
Religious fundamentalism BL
Religious persecution BL
Renewable energy TJ
Revolution to the Civil War, U.S. E 301-453
Revolution, U.S. E 201-298
Revolutions, Eastern Europe DJ
Right to Death RA
Rising Health Care Costs RA
Road engineering TE
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Same-sex marriage HQ
Sanitary Engineering TD
Scholarships LB
School Choice LB
School Funding LB
School Violence LB
School Violence, Bullying BF
Schools, Americas, except United States LE
Schools, Asia. Africa. Oceania LG
Schools, Europe LF
Schools, United States LD
Science (General) Q
Sculpture NB
Seals CD
Self-Image BF
Series (general) AC
Sex and the Media P
Sex Crimes, Behavior HQ
Sex Crimes, Criminology HV
Sex Discrimination HD
Sex Education HQ
Sex Roles, History GN
Sex Roles, Sociology HQ
Sexual Abuse HQ
Sexual Abuse and the Clergy BX
Shipbuilding VM
Single-sex education LB
Slavery, U.S. E 441 453
Sleep Disorders RC
Small Business HD
Smoking, Health aspects RC
Smoking, Social aspects HV
Social history/problems/reform HN
Social pathology HV
Social sciences (general) H
Social usages BJ
Socialism HX
Societies, secret, benevolent, etc. HS
Sociology (general and theoretical) HM
South America F 2201-3799
Soviet Union, history DK
Spanish-American War, U.S. E 714-735
Special Education LC
Statistics HA
Stem cell research QH
Student fraternities and societies, U.S. LJ
Suicide RC
Superstitutions AZ
Surgery RD
Switzerland, history DQ
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Technical chronology CE
Technology, general T
Teen drug abuse HV
Teen Pregnancy RG
Teens and Tobacco HV
The family HQ
The Mediterranean, history D
Theosophy, etc. BP
Therapeutics RM
Transportation HE
Tobacco, Agriculture SB
Tobacco, Social aspects HV
Torture HV
Tourism B
Tsunamis GC
Unemployment UN
UN (United Nations), History JX
United States, general E 151
United States JK
United States, local history F 1-975
US Foreign Policy E
United States Foreign Policy, Treaties JK
USA Patriot Act KF
Vaccine controversies RA
Veterinary medicine SF
Victim’s Rights KF
Vietnam, history DS
Violence HM
Violence against Women HV
Violence and the Media PN
Visual Arts (general) N
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War Crimes, European D
War Crimes, Legal Aspects K
War Crimes, World JC
War of 1812, U.S. E 351-364.9
War with Mexico, U.S. E 401 415.2
War on Terrorism HV
Washington, State F
Water shortages TD
Weapons of Mass Destruction UG
Web site design TK
Welfare Reform HV
West Indies F 1201 2191
Whistleblowers HD
Wildlife QL
Woman HQ
Women’s Health RA
Women’s Studies HQ
Working Poor HV
World Trade Organization HF
World Wide Web TK
Writing Z 40-115.5
Yearbooks (general) AY
Zero tolerance KF
Zoology QL
