Library of Congress Subject Headings
Many academic
libraries use the Library of Congress Subject Headings (LCSH) which
are divided into 21 branches of knowledge represented by letters:
A
- General works
B - Philosophy
C - Auxiliary sciences of history
D - History (general)
E-F - History (Americas)
G - Geography
H - Social sciences
J - Political science
K - Law
L - Education
|
M
- Music
N - Visual arts
P - Language and literature
Q - Science
R - Medicine
S - Agriculture
T - Technology
U - Military science
V - Naval science
Z - Bibliography; library science |
Each branch is
divided into more specific topics represented by combinations of letters
and numbers. For example, the book Teleworking has the call
number HD 2336.3 B523 1995:
H - Social sciences and business
HD - Economic history and conditions 2321 - 4730 - Industry
2331 - 2336 - Household Industry 2336.3 - Telecommuting
Note: this alphanumeric system
differs greatly from the Dewey system that Public Libraries use.
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