Classification
330 - Economics
333 - Economics of land & energy
700 - The arts; fine & decorative arts
363 - Other social problems & services
62
600 - Technology
53
320 - Political science
49
000 - Computer science, information & general works
46
380 - Commerce, communications & transportation
31
900 - History & geography
31
551 - Geology, hydrology & meteorology
25
610 - Medicine & health
25
620 - Engineering & allied operations
25
140 - Specific philosophical schools
19
370 - Education
19
630 - Agriculture & related technologies
17
340 - Law
13
581 - Specific topics in natural history
12
658 - General management
12
576 - Genetics & evolution
8
800 - Literature & rhetoric
8
300 - Social sciences
7
304 - Factors affecting social behavior
7
720 - Architecture
7
100 - Philosophy & psychology
5
200 - Religion
5
530 - Physics
5
400 - Language
4
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
297 - Islam, Babism & Bahai Faith
3
410 - Linguistics
3
657 - Accounting
3
170 - Ethics
2
301 - Sociology & anthropology
2
350 - Public administration & military science
2
414 - Phonology & phonetics
2
520 - Astronomy & allied sciences
2
160 - Logic
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
650 - Management & auxiliary services
1
780 - Music
1