Books in most academic libraries like Norco College use The Library of Congress (or LC or LOC for short) system to organize their books. The one-of-a-kind number that's used for each book is called a call number.
The first letter(s) of a call number not only indicate where a book is located but also what a book is about, with call numbers assigned according to the following classification scheme below. Be sure to browse the nearby books if you’re looking for several books on a subject – you may find something that will be useful.
A - General Works
AE General Encyclopedias
B - Philosophy, Psychology and Religion
B Philosophy
BC Logic
BF Psychology
BL-BX Religion
BP Islam
C - History: auxiliary branches
CB History of Civilization
CC Archaeology
CR Heraldry
CS Genealogy
CT Biography (general)
D - History: General & Old World
D History (general)
DA Great Britain
DC France
DE Mediterranean region
DK Soviet Union
DS Middle East / Asia
DT Egypt / Africa
E-F - History: New World
E North America / U.S.
F Canada/Latin & South America
G - Geography, Anthropology, Recreation
G Geography (general), atlases and maps
GB Physical Geography
GF Human Ecology
GN Anthropology
GR Folklore / Manners & Customs
GV Recreation / Physical Ed
H - Social Science
H Social Sciences (general)
HA Statistics
HB-HD Economics
HE Transportation and Communications
HF Commerce / Management
HG Finance
HJ Accounting
HM Sociology (general)
HQ Family/Marriage
HS Women’s Studies
HV Social Welfare & Criminology
J - Political Science
J Political Science (general)
JC Political Theory
JF-JQ Constitutional History
JS Local government
JX International Law
K - Law
K Law (general)
KD Law of the U.K.
KF Law of the United States
KJ Law of Europe
KBL Law of Islamic countries
L - Education
LA History of Education
LB Theory & Practice of Education
LC Social Aspects of Education
LD-LG Universities, Colleges, and Schools
M - Music
M Musical Scores
ML Literature of Music
MT Musical Instruction
N - Fine Arts
N Visual Arts/Museums (general)
NA Architecture
NB Sculpture
NC Drawing/ Design & Illustration
ND Painting
NE Print Media
NK Decorative & Applied Arts
NX Arts in General
P - Language and Literature
P Linguistics & Philology, Rhetoric, Composition & Communication
PA Classical Languages
PC Romance Languages
PD Germanic Languages
PE English Language
PJ Arabic/Oriental Languages & Literatures
PN Literary History & Collections (general)
PQ Romance Literatures
PR English Literature
PS American Literature
PT Germanic Literature
Q - Science
Q Science (general)
QA Mathematics / computer Science
QB Astronomy
QC Physics
QD Chemistry
QE Geology
QH Biology / Natural History
QK Botany
QL Zoology
QM Human Anatomy
QP Physiology
QR Microbiology
R - Medicine
R Medicine (general)
RA Public health
RC Practice of Medicine
RM Nutrition
RM-RS Pharmacology
RT Nursing
S - Agriculture
S Agriculture (general)
SB Plant Culture
SD Forestry
SF Animal Culture
SH Aquaculture & Fisheries
SK Wildlife Management
T - Technology
T Technology (general)
TA Engineering (general)
TC Hydraulic Engineering
TD Environmental Engineering
TE Highway Engineering
TH Building Construction
TJ Mechanical Engineering
TK Electrical Engineering and Electronics
TL Aeronautics & Motor Vehicles
TN Mining Engineering & Metallurgy
TP Chemical Technology
TR Photography
TS Manufacturing
TT Handicrafts
TX Hotels & Food Service
U - V Military & Naval Science
Z - Bibliography & Library Library Science