Classification
380 - Commerce, communications & transportation
330 - Economics
70
320 - Political science
44
333 - Economics of land & energy
39
700 - The arts; fine & decorative arts
39
000 - Computer science, information & general works
33
900 - History & geography
33
600 - Technology
30
140 - Specific philosophical schools
24
363 - Other social problems & services
24
340 - Law
20
610 - Medicine & health
20
620 - Engineering & allied operations
16
551 - Geology, hydrology & meteorology
14
300 - Social sciences
12
370 - Education
12
580 - Plants (Botany)
8
576 - Genetics & evolution
7
630 - Agriculture & related technologies
7
304 - Factors affecting social behavior
6
658 - General management
6
410 - Linguistics
5
720 - Architecture
5
100 - Philosophy & psychology
4
301 - Sociology & anthropology
4
400 - Language
4
500 - Natural sciences & mathematics
3
530 - Physics
3
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
361 - Social problems & social welfare in general
2
612 - Human physiology
2
791 - Public performances
2
170 - Ethics
1
200 - Religion
1
350 - Public administration & military science
1
364 - Criminology
1
414 - Phonology & phonetics
1
550 - Earth sciences
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1
770 - Photography, photographs & computer art
1
780 - Music
1