Library of Congress Classification

The Library of Congress classification system organizes books and other library materials by subject, to make it easier for you to browse the shelves for materials on a specific topic. Library of Congress call numbers always begin with letters of the alphabet. The letters identify the subject of the work. For example, the letter P at the beginning of a call number indicates that the subject of the work is language or literature. The call number also functions as a location code. You will find it on the bottom of the spine of each book. It also appears in each of the Libraries’ online catalogs as part of bibliographic record for the item.

PS 3573 .A425 C6 1982 : This call number will lead you to The Color Purple

Below is an outline of the Library of Congress classification.


Library of Congress Classification A: General Works
B: Philosophy, Psychology, Religion
C: Auxiliary Sciences of History
D: History – General & Eastern Hemisphere
E-F: History – Western Hemisphere
G: Geography, Anthropology, Recreation
H: Social Sciences
J: Political Science
K: Law
L: Education
M: Music
N: Fine Arts
P: Language and Literature
Q: Sciences
R: Medicine
S: Agriculture
T: Technology
U: Military Science
V: Naval Science
Z: History of Books, Library Science, Bibliography

A – General Works

AC – Collected Works
AE – Encyclopedias
AG – Dictionaries and other general reference works
AI – Indexes
AM – Museums
AP – Periodicals
AS – Academics and Learned Societies
AY – Yearbooks, Almanacs, Directories
AZ – History of Scholarship and Learning

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B – Philosophy, Psychology, Religion

B – History and Systems of Philosophy
BC – Logic
BD – Speculative Philosophy
BF – Psychology
BH – Aesthetics
BJ – Ethics
BL – Religions, Mythology, Rationalism
BM – Judaism
BP – Islam, Bahaism, Theosophy
BQ – Buddhism
BR – Christianity (General)
BS – The Bible
BT – Doctrinal Theology
BV – Practical Theology
BX – Denominations and Sects

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C – Auxiliary Sciences of History

CB – History of Civilization and Culture
CC – Archaeology (General)
CD – Diplomatics, Archives, Seals
CE – Chronology
CJ – Numismatics
CN – Epigraphy
CR – Heraldry
CS – Genealogy
CT – Biography (General)

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D – History (except America)

D – History (General)
DA – Great Britain
DAW – Central Europe
DB – Austria, Czechoslovakia, Hungary
DC – France
DD – Germany
DE – Mediterranean, Greco-Roman World
DG – Italy
DH-DJ – Netherlands, Belgium, Luxembourg
DJK – Eastern Europe
DK – Russia and Poland
DL – Northern Europe and Scandinavia
DP – Spain and Portugal
DR – Eastern Europe and Turkey
DS – Asia
DT – Africa
DU – Oceania, Australia, New Zealand

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E-F – History: America and United States

E – America (General) and United States
F1-F975 – United States (local history)
F1001-F1140 – Canada
F1201-F1392 – Mexico
F1401-3799 – Central and South American, Caribbean

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G – Geography, Anthropology

G – Geography (General)
GA – Mathematical Geography, Cartography
GB – Physical Geography
GC – Oceanography
GE – Environmental Sciences
GF – Human Ecology
GN – Anthropology, Ethnology, Ethnography
GR – Folklore
GT – Manners and Customs
GV – Sports and Recreation

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H – Social Sciences

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
HS – Societies and Clubs
HT – Communities, Classes, Races
HV – Social Pathology, Criminology, Welfare
HX – Communism, Socialism, Anarchism

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J – Political Science

J – Official Documents
JA – Collections and General Works
JC – Political Theory
JK – Constitutional History and Administration
JS – Local Government
JV – Colonization, Emigration and Immigration
JX – International Law, International Relations

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K – Law

K – Law (General)
KF – United States Law

L – Education

L – Education (General)
LA – History of Education
LB – Educational Theory and Practice
LC – Special Aspects
LD – U.S. Educational Institutions
LH – College and School Publications
LJ – Student Fraternities and Societies
LT – Textbooks (General)

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M – Music

M – Music Scores
ML – Literature of Music
MT – Music Instruction and StudyN – Fine ArtsN – Visual Arts (General)
NA – Architecture
NB – Sculpture
NC – Graphic Arts (Drawing, Design, Illustration)
ND – Painting
NE – Print Media
NK – Decorative and Applied Arts
NX – Arts in general

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P – Language and Literature

P – Linguistics
PA – Classical Philology (Greek and Latin)
PB – Modern European Languages, Celtic Languages
PC – Romance Languages
PD – Old Germanic and Scandinavian Languages
PE – English Language
PF – Dutch, Flemish, and German Languages
PG – Slavic Languages and Literature
PH – Finno-Ugrian, Basque Languages & Literature
PJ-PL – Oriental Languages
PM – American Indian and Artificial Languages
PN – Literature, Literary History and Collections
PQ – Romance Literature
PR – English Literature
PS – American Literature
PT – German Literature
PZ – Children’s Literature

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Q – Science

Q – Science (General)
QA – Mathematics
QB – Astronomy
QC – Physics
QD – Chemistry
QE – Geology
QH – Natural History, Biology
QK – Botany
QL – Zoology
QM – Human Anatomy
QP – Physiology
QR – Microbiology

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R – Medicine

R – Medicine (General)
RA – Public Aspects of Medicine
RB – Pathology
RC – Internal Medicine
RD – Surgery
RE – Ophthalmology
RG – Gynecology and Obstetrics
RJ – Pediatrics
RK – Dentistry
RL – Dermatology
RM – Therapeutics, Pharmacology
RS – Pharmacy and Materia Medica
RT – Nursing
RV – Botanic, Thomsonian and Eclectic Medicine
RX – Homeopathy
RZ – Other Systems of Medicine

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S – Agriculture

S – Agriculture (General)
SB – Plant Culture
SD – Forestry
SF – Animal Culture
SH – Aquaculture, Fisheries, Fishing
SK – Hunting

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T – Technology and Engineering

T – Technology (General)
TA-TJ – Engineering
TK – Electronics and Electrical Engineering
TL – Motor Vehicles, Aeronautics, Astronautics
TN – Mining and Metallurgy
TP – Chemical Technology
TR – Photography
TS – Manufactures
TT – Handicrafts, Arts and Crafts
TX – Home Economics and Cooking

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U – Military Science

V – Naval Science

Z – History of Books, Library Science, Bibliography

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For questions contact: Kathy Labadorf, Research & Orientation Services, Homer Babbidge Library (860) 486-1253