Classification
620 - Engineering & allied operations
300 - Social sciences
29
600 - Technology
26
900 - History & geography
20
100 - Philosophy & psychology
14
330 - Economics
14
630 - Agriculture & related technologies
14
320 - Political science
13
700 - The arts; fine & decorative arts
13
301 - Sociology & anthropology
10
363 - Other social problems & services
9
140 - Specific philosophical schools
8
370 - Education
8
333 - Economics of land & energy
7
610 - Medicine & health
7
380 - Commerce, communications & transportation
5
780 - Music
5
000 - Computer science, information & general works
4
400 - Language
4
410 - Linguistics
4
576 - Genetics & evolution
4
720 - Architecture
4
200 - Religion
3
340 - Law
3
530 - Physics
3
500 - Natural sciences & mathematics
2
540 - Chemistry & allied sciences
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
800 - Literature & rhetoric
2
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
580 - Plants (Botany)
1
770 - Photography, photographs & computer art
1