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