Classification
900 - History & geography
320 - Political science
72
700 - The arts; fine & decorative arts
41
800 - Literature & rhetoric
41
300 - Social sciences
27
200 - Religion
24
330 - Economics
22
400 - Language
14
140 - Specific philosophical schools
13
301 - Sociology & anthropology
13
340 - Law
13
600 - Technology
11
333 - Economics of land & energy
10
576 - Genetics & evolution
10
100 - Philosophy & psychology
9
370 - Education
9
380 - Commerce, communications & transportation
9
630 - Agriculture & related technologies
8
304 - Factors affecting social behavior
7
610 - Medicine & health
7
620 - Engineering & allied operations
7
720 - Architecture
7
780 - Music
7
296 - Judaism
5
297 - Islam, Babism & Bahai Faith
5
363 - Other social problems & services
5
410 - Linguistics
5
000 - Computer science, information & general works
4
791 - Public performances
3
350 - Public administration & military science
2
551 - Geology, hydrology & meteorology
2
770 - Photography, photographs & computer art
2
364 - Criminology
1
500 - Natural sciences & mathematics
1
580 - Plants (Botany)
1