Library of Congress Classification System

A: General Works
AE: Encyclopedias
AI: Indexes
AM: Museums
AP: Periodicals
AS: Academies and learned societies
AY: Yearbooks, almanacs, directories
B: Philosophy, Psychology, Religion
B: History & systems of philosophy
BC: Logic
BD: Speculative philosophy
BF: Psychology
BH: Aesthetics
BJ: Ethics
BL: Religions, mythology, rationalism
BM: Judaism
BP: Islam, Bahaism, Theosophy
BR: Christianity (General)
BS: The Bible
BT: Doctrinal theology
BV: Practical theology
BX: Denominations and sects
C: Auxiliary Sciences of History
CB: History of civilization & culture
CC: Archaeology General)
CD: Diplomatics, archives, seals
CE: Chronology
CJ: Numismatics
CN: Epigraphy
CR: Heraldry
CS: Genealogy
CT: Biography (General)
D: History - General & Eastern
D: History (General)
DA: Great Britain
DB: Austria, Czechoslovakia, Hungary
DC: France
DD: Germany
DE: Mediterranean, Greco-Roman world
DF: Greece
DG: Italy
DH, DI, DJ: Netherlands, Belgium, Luxembourg
DK: Russia
DL: Northern Europe
DP: Spain, Portugal
DQ: Switzerland
DR: Eastern Europe; Turkey
DS: Asia
DS520-DS689: Southeast Asia
DT: Africa
DU: Oceania, Australia, New Zealand
DX: Gypsies
E & F: History - Western Hemisphere
E: America (General),United States
F1-975: United States local history
F1001-1140: Canada
F1201-1392: Mexico
F1401-3799: Central and South America, the Caribbean area
G: Geography, Anthropology, Recreation
G: Atlases, Globes, Maps
GA: Mathematical geography, cartography
GB: Physical geography
GC: Oceanography
GF: Human ecology
GN: Anthropology
GR: Folklore
GT: Manners and customs
GV: Sports and recreation
GV1580-GV1799: Dance
H: Social Sciences and Business
H: Social sciences (General)
HA: Statistics
HB: Economic theory
HC: Economic history and conditions
HD: Land, agriculture, industry
HE: Transportation and communication
HF: Commerce
HG: Finance
HJ: Public finance
HM: Sociology
HN: Social history
HQ: Social groups; the family, marriage, women
HS: Societies and clubs
HV: Social pathology, criminology, welfare
HX: Socialism, communism, anarchism
J: Political Science
J: Official documents
JA: Collections and general works
JC: Political theory
JF: Constitutional history and administration
JK: U.S. constitutional history
JS: Local government
JV: Colonization, emigration and immigration
JX: International law, international relations
K: Law
K: Law (General)
KD: Law of the United Kingdom and Ireland
KE: Law of Canada
KF: Law of the United States
KFN: Individual states
KG: Law of Latin America, Mexico and Central America (General)
KH: Law of South America (General)
KJ: Law of Europe
L: Education
L: Education (General)
LA: History of education
LB: Theory and practice
LC: Special aspects
LD: Individual U.S. institutions
LH: College and school publications
LJ: Student fraternities and societies
LT: Textbooks (General)
M: Music
M: Music (General)
ML: Literature of music
MT: Music instruction and study
N: Fine Arts
N: Visual arts (General)
NA: Architecture
NB: Sculpture
NC: Drawing, design, illustration
ND: Painting
NE: Print media
NK: Decorative arts, applied art
NX: Arts in general
P: Language and Literature
P: Linguistics
PA: Greek and Latin
PB: Modern European languages; Celtic languages
PC: Romance languages
PD: Old Germanic and Scandinavian languages
PE: English language
PF: Dutch, Flemish, German languages
PG: Slavic languages and literature
PH: Finno-Ugrian and Basque languages and literature
PJ: Middle Eastern languages and literature
PK: Indo-Iranian languages and literature
PL: East Asian, African, and Oceanic languages and literature
PM: American Indian; artificial languages
PN: Literature; literary history and collections
PN1993-PN1996: Motion Pictures
PQ: Romance literature
PR: English Literature
PS: American literature
PT: Germanic literature
PZ: Children's literature
Q: Science
Q Science (General)
QA: Mathematics
QB: Astronomy
QC: Physics
QD: Chemistry
QE: Geology
QH: Natural history (General)
QK: Botany
QL: Zoology
QM: Human anatomy
QP: Physiology
QR: Microbiology
R: Medicine
R: Medicine (General)
RA: Public aspects of medicine
RB: Pathology
RC: Internal medicine
RD: Surgery
RE: Ophthalmology
RF: Otorhinolaryngology
RG: Gynecology and obstetrics
RJ: Pediatrics
RK: Dentistry
RL: Dermatology
RM: Therapeutics; pharmacology
RS: Pharmacy and materia medica
RT: Nursing
RX: Homeopathy
RZ: Other systems of medicine
S: Agriculture
S: Agriculture (General)
SB: Plant culture
SD: Forestry
SF: Animal culture
SH: Aquaculture, fisheries, fishing
SK: Hunting
T: Engineering & Technology
T: Technology (General)
TA: Engineering (General)
TC: Hydraulic engineering
TD: Environmental technology
TE: Highway engineering
TF: Railroad engineering
TG: Bridge engineering
TH: Building construction
TJ: Mechanical engineering and machinery
TK: Electrical engineering; electronics
TL: Motor vehicles; aeronautics; astronautics
TN: Mining engineering; metallurgy
TP: Chemical technology
TR: Photography
TS: Manufactures
TT: Handicrafts; arts and crafts
TX: Home economics; cooking
U: Military Science
UA: Armies
UB: Military administration
UC: Maintenance and transportation
UD: Infantry
UE: Cavalry. Armored and mechanized cavalry
UF: Artillery
UG: Military engineering
UH: Other services
V: Naval Science
VA: Navies
VB: Naval administration
VC: Naval maintenance
VD: Naval seamen
VE: Marines
VF: Naval ordnance
VG: Minor services of navies
VK: Navigation. Merchant marine
VM: Naval architecture. Shipbuilding. Marine engineering
Z: Library Science