Classification
330 - Economics
620 - Engineering & allied operations
900 - History & geography
600 - Technology
4
700 - The arts; fine & decorative arts
4
300 - Social sciences
3
363 - Other social problems & services
3
140 - Specific philosophical schools
2
301 - Sociology & anthropology
2
333 - Economics of land & energy
2
340 - Law
2
370 - Education
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
720 - Architecture
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
1
530 - Physics
1
540 - Chemistry & allied sciences
1
576 - Genetics & evolution
1
658 - General management
1
800 - Literature & rhetoric
1