Classification
320 - Political science
380 - Commerce, communications & transportation
610 - Medicine & health
700 - The arts; fine & decorative arts
18
333 - Economics of land & energy
14
000 - Computer science, information & general works
13
600 - Technology
13
330 - Economics
11
363 - Other social problems & services
11
370 - Education
9
900 - History & geography
9
551 - Geology, hydrology & meteorology
8
140 - Specific philosophical schools
7
720 - Architecture
6
304 - Factors affecting social behavior
4
620 - Engineering & allied operations
4
300 - Social sciences
3
340 - Law
3
400 - Language
3
576 - Genetics & evolution
3
658 - General management
3
100 - Philosophy & psychology
2
170 - Ethics
2
410 - Linguistics
2
581 - Specific topics in natural history
2
200 - Religion
1
301 - Sociology & anthropology
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1