Classification
320 - Political science
380 - Commerce, communications & transportation
330 - Economics
133
333 - Economics of land & energy
132
363 - Other social problems & services
89
700 - The arts; fine & decorative arts
82
600 - Technology
79
000 - Computer science, information & general works
78
900 - History & geography
56
140 - Specific philosophical schools
42
551 - Geology, hydrology & meteorology
38
610 - Medicine & health
35
370 - Education
32
620 - Engineering & allied operations
29
300 - Social sciences
25
336 - Public finance
23
340 - Law
23
304 - Factors affecting social behavior
22
100 - Philosophy & psychology
21
630 - Agriculture & related technologies
18
576 - Genetics & evolution
16
658 - General management
14
800 - Literature & rhetoric
14
170 - Ethics
13
400 - Language
13
581 - Specific topics in natural history
13
720 - Architecture
13
200 - Religion
12
301 - Sociology & anthropology
12
410 - Linguistics
10
580 - Plants (Botany)
9
361 - Social problems & social welfare in general
8
500 - Natural sciences & mathematics
8
657 - Accounting
7
350 - Public administration & military science
6
414 - Phonology & phonetics
5
791 - Public performances
5
297 - Islam, Babism & Bahai Faith
4
530 - Physics
4
540 - Chemistry & allied sciences
4
780 - Music
4
550 - Earth sciences
3
520 - Astronomy & allied sciences
2
360 - Social problems & services; associations
1
364 - Criminology
1
650 - Management & auxiliary services
1