Classification
900 - History & geography
320 - Political science
50
700 - The arts; fine & decorative arts
30
333 - Economics of land & energy
20
330 - Economics
18
363 - Other social problems & services
15
380 - Commerce, communications & transportation
15
000 - Computer science, information & general works
14
140 - Specific philosophical schools
14
300 - Social sciences
13
200 - Religion
12
600 - Technology
12
340 - Law
11
620 - Engineering & allied operations
10
370 - Education
9
610 - Medicine & health
9
720 - Architecture
7
301 - Sociology & anthropology
6
400 - Language
6
800 - Literature & rhetoric
6
100 - Philosophy & psychology
5
297 - Islam, Babism & Bahai Faith
5
551 - Geology, hydrology & meteorology
5
780 - Music
5
304 - Factors affecting social behavior
4
410 - Linguistics
3
170 - Ethics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
296 - Judaism
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
530 - Physics
1
590 - Animals (Zoology)
1
630 - Agriculture & related technologies
1
657 - Accounting
1
770 - Photography, photographs & computer art
1
791 - Public performances
1