Classification
363 - Other social problems & services
620 - Engineering & allied operations
600 - Technology
56
333 - Economics of land & energy
21
540 - Chemistry & allied sciences
21
330 - Economics
17
700 - The arts; fine & decorative arts
16
900 - History & geography
16
000 - Computer science, information & general works
10
370 - Education
9
140 - Specific philosophical schools
8
610 - Medicine & health
8
658 - General management
8
380 - Commerce, communications & transportation
6
320 - Political science
5
630 - Agriculture & related technologies
5
720 - Architecture
5
340 - Law
4
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
400 - Language
3
551 - Geology, hydrology & meteorology
3
297 - Islam, Babism & Bahai Faith
2
300 - Social sciences
2
304 - Factors affecting social behavior
2
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
800 - Literature & rhetoric
2
200 - Religion
1
331 - Labor economics
1
338 - Production
1
410 - Linguistics
1
657 - Accounting
1
780 - Music
1