Classification
300 - Social sciences
363 - Other social problems & services
610 - Medicine & health
600 - Technology
22
330 - Economics
15
333 - Economics of land & energy
14
320 - Political science
13
140 - Specific philosophical schools
11
620 - Engineering & allied operations
9
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
8
900 - History & geography
8
170 - Ethics
7
340 - Law
7
380 - Commerce, communications & transportation
7
370 - Education
6
576 - Genetics & evolution
6
581 - Specific topics in natural history
6
100 - Philosophy & psychology
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
301 - Sociology & anthropology
4
500 - Natural sciences & mathematics
4
630 - Agriculture & related technologies
4
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
200 - Religion
2
720 - Architecture
2
800 - Literature & rhetoric
2
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
364 - Criminology
1
400 - Language
1
410 - Linguistics
1
650 - Management & auxiliary services
1
657 - Accounting
1
658 - General management
1