Classification
380 - Commerce, communications & transportation
300 - Social sciences
63
320 - Political science
25
301 - Sociology & anthropology
20
330 - Economics
20
900 - History & geography
16
600 - Technology
15
000 - Computer science, information & general works
14
700 - The arts; fine & decorative arts
12
370 - Education
11
340 - Law
9
100 - Philosophy & psychology
8
140 - Specific philosophical schools
7
200 - Religion
7
333 - Economics of land & energy
7
400 - Language
7
610 - Medicine & health
7
620 - Engineering & allied operations
6
363 - Other social problems & services
5
384 - Communications; telecommunication
5
302 - Social interaction
4
304 - Factors affecting social behavior
4
658 - General management
4
410 - Linguistics
3
500 - Natural sciences & mathematics
3
780 - Music
3
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
630 - Agriculture & related technologies
2
650 - Management & auxiliary services
2
720 - Architecture
2
791 - Public performances
2
800 - Literature & rhetoric
2
303 - Social processes
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
530 - Physics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1