Guide : Library Classification System

Library materials are arranged according to the Library of Congress Classification system (LC). Each LC number represents a subject. The LC number makes up part of a call number that is labeled on library materials. The call number is a guide to finding materials in the library. 

Below is an example of a call number and what it means. 
For example: 

Title : 
Biology : the essentials by Marielle Hoefnagels

Call Number :
QH
315
H64
2013
C.1
Explanation : 
QH    - Represent the class for Biology subject
315    - Specific number for Essentials of biology subject
H64   - First three letters of the author’s surname, “Hoefnagels..." 
2013  - Book's publication year
C.1    - First copy of this title  
A -- GENERAL WORKS 
B -- PHILOSOPHY. PSYCHOLOGY. RELIGION 
C -- AUXILIARY SCIENCES OF HISTORY 
D -- WORLD HISTORY AND HISTORY OF EUROPE, ASIA, AFRICA, AUSTRALIA, NEW ZEALAND, ETC. 
E -- HISTORY OF THE AMERICAS 
F -- HISTORY OF THE AMERICAS 
G -- GEOGRAPHY. ANTHROPOLOGY. RECREATION 
H -- SOCIAL SCIENCES 
J -- POLITICAL SCIENCE 
K -- LAW 
L -- EDUCATION 
M -- MUSIC AND BOOKS ON MUSIC 
N -- FINE ARTS 
P -- LANGUAGE AND LITERATURE 
Q -- SCIENCE  
R -- MEDICINE 
S -- AGRICULTURE 
T -- TECHNOLOGY 
U -- MILITARY SCIENCE 
V -- NAVAL SCIENCE 
Z -- BIBLIOGRAPHY. LIBRARY SCIENCE. INFORMATION RESOURCES (GENERAL) 
Library of Congress Classification (LC) Outline 
http://www.loc.gov/catdir/cpso/lcco/

Dewey Decimal Classification (DDC) Outline 
http://www.oclc.org/content/dam/oclc/dewey/resources/summaries/deweysummaries.pdf

Map LC to Dewey (DDC) Classification 
http://www.questionpoint.org/crs/html/help/it/ask/ask_map_lcctoddc.html

Map DDC to LC Classification
http://www.questionpoint.org/crs/html/help/it/ask/ask_map_ddctolcc.html
Picture
MCKL Tan Sri Runme Shaw Library
Methodist College Kuala Lumpur
Off Jalan Tun Sambanthan 4, Brickfield, 50470 Kuala Lumpur, Malaysia
Tel :+603-2274 1851 (ext.302) 
Fax :+603-2273 6102
Last Updated : February 2016