The IPL's Ask a Question Reference Service will close for the holidays, beginning December 17, 2007. We will reopen our service on Monday, January 7, 2008. Happy Holidays from all of us at the IPL!

Home » Special Collections » TeenSpace » A+ Research & Writing

A+ Page Header

Library of Congress Classification System

Main Classes Subclasses
A - General Works AE - Encyclopedias
AI - Indexes
AN - Newspapers
AP - Periodicals
B - Philosophy, Psychology B-BD - Philosophy
BF - Psychology
BH - Esthetics
BJ - Ethics
BL-BX - Religions, Mythology
C - History (Auxiliary sciences: archaeology, genealogy, etc.) (various)
D - History (except America) DA - Great Britain
DC - France
DD - Germany
DK - Russia
DS - Asia
DT - Africa
E-F - America and U. S. F1-F970 - United States
F1201-F3899 - Latin America
G - Geography, Anthropology G-GF - Geography, Travel, Atlases
GN - Anthropology, Ethnography
GR - Folklore
GV - Sports
H - Social Sciences HA-HJ - Economics
HM-HQ - Sociology
HX - Communism, Socialism, Anarchism
J - Political Science  
K - Law  
L - Education  
M - Music ML - Literature of Music
MT - Musical Instruction
N - Fine Arts NA - Architecture
NB - Sculpture & Related Arts
NC - Graphic Arts
ND - Painting
NK - Applied Arts
NX - The arts in general
P - Language and Literature PA - Classical Philology
PB-PH - Modern European Languages
PJ-PL - Oriental Languages
PQ - Romance Literatures
PR - English Literature
PS - American Literature
PT - German Literature
Q - Science QA - Mathematics
QB - Astronomy
QC - Physics
QD - Chemistry
QE - Geology
QH - Natural History
QK - Botany
QL - Zoology
QM - Human Anatomy
QP - Physiology
QR - Bacteriology
R - Medicine (various)
S - Agriculture (various)
U - Military Science  
V - Naval Science  
T - Technology & Engineering (various)
Z - Bibliography & Library Science  

an A+ image linking to home page a green book linking to table of contents a pink sneaker linking to writing guide a library image linking to a research guide a globe image

A+ Research & Writing for high school and college students was created by Kathryn L. Schwartz