Classification
320 - Political science
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
000 - Computer science, information & general works
52
333 - Economics of land & energy
50
330 - Economics
42
363 - Other social problems & services
39
600 - Technology
39
900 - History & geography
37
140 - Specific philosophical schools
21
370 - Education
20
551 - Geology, hydrology & meteorology
20
620 - Engineering & allied operations
19
610 - Medicine & health
18
720 - Architecture
13
340 - Law
12
300 - Social sciences
10
304 - Factors affecting social behavior
10
576 - Genetics & evolution
10
630 - Agriculture & related technologies
9
100 - Philosophy & psychology
8
581 - Specific topics in natural history
8
400 - Language
7
658 - General management
7
800 - Literature & rhetoric
7
500 - Natural sciences & mathematics
6
170 - Ethics
5
200 - Religion
5
361 - Social problems & social welfare in general
5
301 - Sociology & anthropology
4
410 - Linguistics
4
414 - Phonology & phonetics
4
580 - Plants (Botany)
3
657 - Accounting
3
780 - Music
3
297 - Islam, Babism & Bahai Faith
2
520 - Astronomy & allied sciences
2
530 - Physics
2
540 - Chemistry & allied sciences
2
350 - Public administration & military science
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
791 - Public performances
1