Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
600 - Technology
333 - Economics of land & energy
35
700 - The arts; fine & decorative arts
29
620 - Engineering & allied operations
22
363 - Other social problems & services
20
380 - Commerce, communications & transportation
14
900 - History & geography
13
551 - Geology, hydrology & meteorology
12
370 - Education
11
140 - Specific philosophical schools
10
630 - Agriculture & related technologies
10
300 - Social sciences
8
610 - Medicine & health
8
658 - General management
6
657 - Accounting
5
720 - Architecture
5
100 - Philosophy & psychology
4
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
170 - Ethics
3
340 - Law
3
410 - Linguistics
3
530 - Physics
3
576 - Genetics & evolution
3
400 - Language
2
500 - Natural sciences & mathematics
2
780 - Music
2
800 - Literature & rhetoric
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
540 - Chemistry & allied sciences
1
770 - Photography, photographs & computer art
1