Classification
320 - Political science
19
700 - The arts; fine & decorative arts
19
900 - History & geography
19
330 - Economics
17
333 - Economics of land & energy
17
300 - Social sciences
14
610 - Medicine & health
12
600 - Technology
11
370 - Education
10
000 - Computer science, information & general works
9
100 - Philosophy & psychology
8
361 - Social problems & social welfare in general
8
800 - Literature & rhetoric
8
363 - Other social problems & services
7
301 - Sociology & anthropology
6
340 - Law
6
620 - Engineering & allied operations
6
200 - Religion
5
380 - Commerce, communications & transportation
5
304 - Factors affecting social behavior
4
400 - Language
4
140 - Specific philosophical schools
3
410 - Linguistics
3
551 - Geology, hydrology & meteorology
3
360 - Social problems & services; associations
2
364 - Criminology
2
581 - Specific topics in natural history
2
780 - Music
2
170 - Ethics
1
293 - Germanic religion
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
500 - Natural sciences & mathematics
1
570 - Life sciences; biology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
657 - Accounting
1
791 - Public performances
1