Classification
100 - Philosophy & psychology
500 - Natural sciences & mathematics
333 - Economics of land & energy
36
370 - Education
31
610 - Medicine & health
19
400 - Language
18
700 - The arts; fine & decorative arts
16
330 - Economics
15
900 - History & geography
14
140 - Specific philosophical schools
13
363 - Other social problems & services
13
600 - Technology
13
000 - Computer science, information & general works
9
530 - Physics
8
120 - Epistemology, causation & humankind
7
170 - Ethics
7
380 - Commerce, communications & transportation
7
300 - Social sciences
6
340 - Law
6
410 - Linguistics
6
576 - Genetics & evolution
6
620 - Engineering & allied operations
6
320 - Political science
5
780 - Music
5
304 - Factors affecting social behavior
4
612 - Human physiology
4
720 - Architecture
4
361 - Social problems & social welfare in general
3
657 - Accounting
3
160 - Logic
2
301 - Sociology & anthropology
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
658 - General management
2
200 - Religion
1
336 - Public finance
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
800 - Literature & rhetoric
1