Classification
000 - Computer science, information & general works
320 - Political science
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
333 - Economics of land & energy
31
363 - Other social problems & services
24
600 - Technology
24
330 - Economics
23
900 - History & geography
16
551 - Geology, hydrology & meteorology
13
370 - Education
12
140 - Specific philosophical schools
11
620 - Engineering & allied operations
11
610 - Medicine & health
10
630 - Agriculture & related technologies
8
581 - Specific topics in natural history
6
720 - Architecture
6
300 - Social sciences
5
340 - Law
5
576 - Genetics & evolution
5
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
400 - Language
4
800 - Literature & rhetoric
4
170 - Ethics
3
200 - Religion
3
301 - Sociology & anthropology
3
361 - Social problems & social welfare in general
3
410 - Linguistics
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
2
520 - Astronomy & allied sciences
2
530 - Physics
2
540 - Chemistry & allied sciences
2
657 - Accounting
2
360 - Social problems & services; associations
1
550 - Earth sciences
1
580 - Plants (Botany)
1
658 - General management
1
780 - Music
1
791 - Public performances
1