Classification
300 - Social sciences
320 - Political science
370 - Education
100 - Philosophy & psychology
16
900 - History & geography
16
600 - Technology
14
301 - Sociology & anthropology
13
140 - Specific philosophical schools
12
330 - Economics
12
333 - Economics of land & energy
12
700 - The arts; fine & decorative arts
12
200 - Religion
7
304 - Factors affecting social behavior
7
340 - Law
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
620 - Engineering & allied operations
7
000 - Computer science, information & general works
6
500 - Natural sciences & mathematics
6
400 - Language
5
410 - Linguistics
4
610 - Medicine & health
4
630 - Agriculture & related technologies
3
780 - Music
3
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
530 - Physics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
120 - Epistemology, causation & humankind
1
361 - Social problems & social welfare in general
1
364 - Criminology
1
550 - Earth sciences
1
576 - Genetics & evolution
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
800 - Literature & rhetoric
1