Classification
000 - Computer science, information & general works
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
20
333 - Economics of land & energy
14
363 - Other social problems & services
14
320 - Political science
10
551 - Geology, hydrology & meteorology
8
900 - History & geography
7
140 - Specific philosophical schools
6
330 - Economics
6
600 - Technology
6
400 - Language
4
550 - Earth sciences
3
576 - Genetics & evolution
3
580 - Plants (Botany)
3
100 - Philosophy & psychology
2
304 - Factors affecting social behavior
2
414 - Phonology & phonetics
2
530 - Physics
2
540 - Chemistry & allied sciences
2
581 - Specific topics in natural history
2
610 - Medicine & health
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
296 - Judaism
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
370 - Education
1
410 - Linguistics
1
590 - Animals (Zoology)
1
630 - Agriculture & related technologies
1
658 - General management
1
780 - Music
1
791 - Public performances
1