Classification
900 - History & geography
36
700 - The arts; fine & decorative arts
16
320 - Political science
15
800 - Literature & rhetoric
10
300 - Social sciences
9
140 - Specific philosophical schools
8
400 - Language
8
600 - Technology
8
330 - Economics
7
200 - Religion
6
000 - Computer science, information & general works
5
304 - Factors affecting social behavior
5
380 - Commerce, communications & transportation
5
333 - Economics of land & energy
4
100 - Philosophy & psychology
3
340 - Law
3
363 - Other social problems & services
3
370 - Education
3
551 - Geology, hydrology & meteorology
3
610 - Medicine & health
3
620 - Engineering & allied operations
3
301 - Sociology & anthropology
2
350 - Public administration & military science
2
160 - Logic
1
170 - Ethics
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
410 - Linguistics
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
581 - Specific topics in natural history
1
658 - General management
1
720 - Architecture
1
780 - Music
1
791 - Public performances
1