Classification
363 - Other social problems & services
900 - History & geography
600 - Technology
42
620 - Engineering & allied operations
39
333 - Economics of land & energy
31
700 - The arts; fine & decorative arts
29
380 - Commerce, communications & transportation
21
330 - Economics
17
610 - Medicine & health
14
140 - Specific philosophical schools
12
720 - Architecture
12
000 - Computer science, information & general works
11
320 - Political science
9
576 - Genetics & evolution
7
580 - Plants (Botany)
7
340 - Law
6
370 - Education
5
500 - Natural sciences & mathematics
5
800 - Literature & rhetoric
5
300 - Social sciences
4
400 - Language
4
551 - Geology, hydrology & meteorology
3
581 - Specific topics in natural history
3
630 - Agriculture & related technologies
3
658 - General management
3
170 - Ethics
2
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
100 - Philosophy & psychology
1
350 - Public administration & military science
1
530 - Physics
1
657 - Accounting
1