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Library Collection Help for
Current Topics & Controversies

Library of Congress Classification System

The Carnegie Library of Pittsburgh uses the Library of Congress Classification System. The Library of Congress offers an overview of the classes. See our Library Subject Guide for more help with Subject Headings.

Subject Area LC Class
Abortion HQ 767
RG 648
RA 1067
Acid Rain TD 196.A
AIDS (Disease) RC 607.A
RA 644.A
Alcoholism RC 565
HV 5201-570
Alternative Medicine R 733
Alzheimer's Disease RC 523
RC 524
Animal Rights HV 4915
HV 4708
Anorexia Nervosa RC 552.A
Bankruptcy HG 3760-3769
Battered Women
Abused Women
Wife Abuse
HV 6626
Capital Punishment HV 8694-8699
KF 26-92
KF 9227-9725
Child Abuse HV 713-742
Civil Rights JC 571
KF 4750
Cloning QH 442.2
Communism HX 626-795
Copyright Z 551-656
KF 2992-3093
Copyright (Music) Z 653
Domestic Abuse (Family Violence) HQ 809-809.3
HV 6626
Drug Abuse HV 5800-5940,
RC 563-568
Drugs RM 300-RM 671
Drunk Driving HE 5620.D7
Euthanasia R 726
Evolution QH 361-369
Extrasensory Perception (ESP) BF 1312
Family Violence HQ 809 - HQ 809.3
Gambling GV 1301
HV 6710-6721
Genetic Engineering QH 442
Gun Control HV 436
KF 3941
Hazardous Wastes TD 811
HD 4483
KF 3946-3958
Homelessness HV 4505-4506
HV 1445
Homosexuality RC 558
HQ 75-76.8
Juvenile Delinquency HV9051-9230.7
Ku Klux Klan E 668
HS 2330.K6-2330.K63
Nuclear Arms Control JX 194.7-1974
Nuclear Energy TK 9145-9155
QC 773-792
HD 9698
Nuclear Power Plants TK 1078
Nuclear War
Nuclear Weapons
U 263-264
Pollution, Air & Water TD174-180,
QH541-545
Pornography HQ471
Poverty HV1-4630
HC79.P6
HC110.P6
Prisons HV8301-9920
Prohibition HV5088-5099
Prostitution HQ101-440
Radiation QC 475
Rape HV 6558-6569
School Desegregation LC 212-214
Smoking HV 5725-5770
RC 567
STD (Sexually Transmitted Diseases) RA 644.U4
RC 200 - RC 203
Substance Abuse RC 563-568
Suicide HV 6543-6548
RC 569
RA 1136
Teenage Pregnancy HQ 759
RG 556
Teenage Suicide HV 6546
Terrorism JX 6731.T4
Welfare HV16-699
KF3720
HC110
Wicca BF 1566
Witchcraft BF1562.5-1584