Classification
140 - Specific philosophical schools
330 - Economics
600 - Technology
333 - Economics of land & energy
55
700 - The arts; fine & decorative arts
53
620 - Engineering & allied operations
46
363 - Other social problems & services
43
000 - Computer science, information & general works
39
610 - Medicine & health
31
380 - Commerce, communications & transportation
30
900 - History & geography
28
320 - Political science
22
630 - Agriculture & related technologies
18
658 - General management
15
370 - Education
14
300 - Social sciences
12
551 - Geology, hydrology & meteorology
12
576 - Genetics & evolution
9
581 - Specific topics in natural history
9
340 - Law
8
580 - Plants (Botany)
8
100 - Philosophy & psychology
7
500 - Natural sciences & mathematics
7
170 - Ethics
6
400 - Language
6
720 - Architecture
6
800 - Literature & rhetoric
6
301 - Sociology & anthropology
4
304 - Factors affecting social behavior
4
361 - Social problems & social welfare in general
4
200 - Religion
3
410 - Linguistics
2
540 - Chemistry & allied sciences
2
657 - Accounting
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
338 - Production
1
350 - Public administration & military science
1
612 - Human physiology
1
770 - Photography, photographs & computer art
1
780 - Music
1