Classification
330 - Economics
340 - Law
370 - Education
380 - Commerce, communications & transportation
620 - Engineering & allied operations
4
200 - Religion
3
300 - Social sciences
3
363 - Other social problems & services
3
600 - Technology
3
700 - The arts; fine & decorative arts
3
900 - History & geography
3
000 - Computer science, information & general works
2
301 - Sociology & anthropology
2
400 - Language
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
320 - Political science
1
333 - Economics of land & energy
1
410 - Linguistics
1
610 - Medicine & health
1
658 - General management
1
720 - Architecture
1
780 - Music
1
800 - Literature & rhetoric
1