Classification
320 - Political science
330 - Economics
600 - Technology
333 - Economics of land & energy
84
363 - Other social problems & services
60
700 - The arts; fine & decorative arts
56
620 - Engineering & allied operations
53
000 - Computer science, information & general works
48
900 - History & geography
39
380 - Commerce, communications & transportation
32
300 - Social sciences
30
551 - Geology, hydrology & meteorology
29
370 - Education
25
610 - Medicine & health
25
140 - Specific philosophical schools
21
630 - Agriculture & related technologies
16
100 - Philosophy & psychology
15
658 - General management
14
581 - Specific topics in natural history
12
340 - Law
10
580 - Plants (Botany)
10
304 - Factors affecting social behavior
8
576 - Genetics & evolution
8
657 - Accounting
8
720 - Architecture
8
170 - Ethics
6
400 - Language
6
780 - Music
6
800 - Literature & rhetoric
6
200 - Religion
5
301 - Sociology & anthropology
5
350 - Public administration & military science
5
361 - Social problems & social welfare in general
5
410 - Linguistics
5
530 - Physics
4
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
297 - Islam, Babism & Bahai Faith
2
336 - Public finance
2
360 - Social problems & services; associations
2
414 - Phonology & phonetics
2
770 - Photography, photographs & computer art
2
520 - Astronomy & allied sciences
1
650 - Management & auxiliary services
1