Classification
000 - Computer science, information & general works
330 - Economics
370 - Education
600 - Technology
23
333 - Economics of land & energy
22
700 - The arts; fine & decorative arts
21
320 - Political science
18
363 - Other social problems & services
18
380 - Commerce, communications & transportation
18
610 - Medicine & health
12
140 - Specific philosophical schools
10
900 - History & geography
10
620 - Engineering & allied operations
9
551 - Geology, hydrology & meteorology
6
630 - Agriculture & related technologies
6
340 - Law
5
400 - Language
5
576 - Genetics & evolution
5
658 - General management
5
300 - Social sciences
4
304 - Factors affecting social behavior
4
581 - Specific topics in natural history
4
720 - Architecture
4
170 - Ethics
3
200 - Religion
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
657 - Accounting
3
100 - Philosophy & psychology
2
297 - Islam, Babism & Bahai Faith
2
361 - Social problems & social welfare in general
2
580 - Plants (Botany)
2
780 - Music
2
160 - Logic
1
336 - Public finance
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1