Classification
140 - Specific philosophical schools
330 - Economics
600 - Technology
51
700 - The arts; fine & decorative arts
50
333 - Economics of land & energy
49
363 - Other social problems & services
46
000 - Computer science, information & general works
39
620 - Engineering & allied operations
36
610 - Medicine & health
27
380 - Commerce, communications & transportation
25
900 - History & geography
25
320 - Political science
24
630 - Agriculture & related technologies
16
658 - General management
12
576 - Genetics & evolution
11
300 - Social sciences
10
580 - Plants (Botany)
10
551 - Geology, hydrology & meteorology
9
370 - Education
8
581 - Specific topics in natural history
8
340 - Law
7
720 - Architecture
7
170 - Ethics
6
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
500 - Natural sciences & mathematics
4
800 - Literature & rhetoric
4
200 - Religion
3
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
400 - Language
2
540 - Chemistry & allied sciences
2
657 - Accounting
2
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
612 - Human physiology
1
780 - Music
1