Classification
000 - Computer science, information & general works
370 - Education
600 - Technology
700 - The arts; fine & decorative arts
40
380 - Commerce, communications & transportation
26
330 - Economics
23
333 - Economics of land & energy
23
363 - Other social problems & services
23
610 - Medicine & health
23
620 - Engineering & allied operations
23
140 - Specific philosophical schools
18
900 - History & geography
18
320 - Political science
15
400 - Language
13
100 - Philosophy & psychology
12
300 - Social sciences
10
720 - Architecture
8
170 - Ethics
7
576 - Genetics & evolution
7
410 - Linguistics
6
551 - Geology, hydrology & meteorology
6
340 - Law
5
500 - Natural sciences & mathematics
5
630 - Agriculture & related technologies
5
304 - Factors affecting social behavior
4
530 - Physics
4
581 - Specific topics in natural history
4
780 - Music
4
800 - Literature & rhetoric
4
361 - Social problems & social welfare in general
3
540 - Chemistry & allied sciences
3
580 - Plants (Botany)
3
657 - Accounting
3
658 - General management
3
200 - Religion
2
360 - Social problems & services; associations
2
770 - Photography, photographs & computer art
2
160 - Logic
1
301 - Sociology & anthropology
1
336 - Public finance
1
350 - Public administration & military science
1