Classification
100 - Philosophy & psychology
500 - Natural sciences & mathematics
333 - Economics of land & energy
24
370 - Education
17
610 - Medicine & health
16
700 - The arts; fine & decorative arts
15
900 - History & geography
15
300 - Social sciences
14
363 - Other social problems & services
13
600 - Technology
12
400 - Language
11
000 - Computer science, information & general works
9
140 - Specific philosophical schools
7
576 - Genetics & evolution
7
301 - Sociology & anthropology
6
330 - Economics
6
380 - Commerce, communications & transportation
6
170 - Ethics
5
200 - Religion
5
410 - Linguistics
5
120 - Epistemology, causation & humankind
4
320 - Political science
4
612 - Human physiology
4
620 - Engineering & allied operations
4
780 - Music
4
530 - Physics
3
340 - Law
2
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
720 - Architecture
2
160 - Logic
1
581 - Specific topics in natural history
1
800 - Literature & rhetoric
1