Classification
330 - Economics
900 - History & geography
320 - Political science
217
600 - Technology
134
620 - Engineering & allied operations
117
700 - The arts; fine & decorative arts
117
333 - Economics of land & energy
88
300 - Social sciences
54
380 - Commerce, communications & transportation
54
363 - Other social problems & services
53
000 - Computer science, information & general works
45
340 - Law
40
610 - Medicine & health
28
370 - Education
26
630 - Agriculture & related technologies
26
140 - Specific philosophical schools
24
576 - Genetics & evolution
20
580 - Plants (Botany)
20
658 - General management
18
800 - Literature & rhetoric
17
720 - Architecture
16
500 - Natural sciences & mathematics
13
301 - Sociology & anthropology
10
400 - Language
9
551 - Geology, hydrology & meteorology
9
100 - Philosophy & psychology
7
414 - Phonology & phonetics
6
780 - Music
6
304 - Factors affecting social behavior
5
200 - Religion
4
410 - Linguistics
4
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
170 - Ethics
3
530 - Physics
3
770 - Photography, photographs & computer art
3
791 - Public performances
3
160 - Logic
2
336 - Public finance
2
350 - Public administration & military science
2
615 - Pharmacology & therapeutics
2
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
657 - Accounting
1