Classification
300 - Social sciences
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
600 - Technology
21
363 - Other social problems & services
14
630 - Agriculture & related technologies
13
330 - Economics
12
333 - Economics of land & energy
12
900 - History & geography
12
140 - Specific philosophical schools
11
320 - Political science
11
380 - Commerce, communications & transportation
10
000 - Computer science, information & general works
9
720 - Architecture
8
100 - Philosophy & psychology
7
370 - Education
7
576 - Genetics & evolution
7
610 - Medicine & health
7
301 - Sociology & anthropology
6
340 - Law
6
500 - Natural sciences & mathematics
6
540 - Chemistry & allied sciences
6
551 - Geology, hydrology & meteorology
6
580 - Plants (Botany)
6
170 - Ethics
4
530 - Physics
4
200 - Religion
3
400 - Language
3
414 - Phonology & phonetics
3
581 - Specific topics in natural history
3
612 - Human physiology
3
780 - Music
3
800 - Literature & rhetoric
3
410 - Linguistics
2
658 - General management
2
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
770 - Photography, photographs & computer art
1