Classification
370 - Education
330 - Economics
30
600 - Technology
25
320 - Political science
22
333 - Economics of land & energy
22
610 - Medicine & health
20
700 - The arts; fine & decorative arts
20
000 - Computer science, information & general works
19
363 - Other social problems & services
18
380 - Commerce, communications & transportation
11
900 - History & geography
11
300 - Social sciences
8
304 - Factors affecting social behavior
8
551 - Geology, hydrology & meteorology
8
100 - Philosophy & psychology
7
400 - Language
7
140 - Specific philosophical schools
5
658 - General management
5
720 - Architecture
5
200 - Religion
4
340 - Law
4
361 - Social problems & social welfare in general
3
580 - Plants (Botany)
3
620 - Engineering & allied operations
3
630 - Agriculture & related technologies
3
530 - Physics
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
153 - Mental processes & intelligence
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
336 - Public finance
1
364 - Criminology
1
371 - Schools & their activities; special education
1
519 - Probabilities & applied mathematics
1
540 - Chemistry & allied sciences
1
657 - Accounting
1
780 - Music
1