Classification
333 - Economics of land & energy
363 - Other social problems & services
330 - Economics
26
600 - Technology
23
700 - The arts; fine & decorative arts
21
620 - Engineering & allied operations
19
000 - Computer science, information & general works
16
320 - Political science
12
551 - Geology, hydrology & meteorology
10
900 - History & geography
10
380 - Commerce, communications & transportation
9
610 - Medicine & health
7
630 - Agriculture & related technologies
6
576 - Genetics & evolution
5
580 - Plants (Botany)
5
340 - Law
4
658 - General management
3
140 - Specific philosophical schools
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
370 - Education
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
100 - Philosophy & psychology
1
200 - Religion
1
350 - Public administration & military science
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
581 - Specific topics in natural history
1
612 - Human physiology
1
657 - Accounting
1
800 - Literature & rhetoric
1