Classification
330 - Economics
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
4
720 - Architecture
800 - Literature & rhetoric
600 - Technology
3
900 - History & geography
3
000 - Computer science, information & general works
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
380 - Commerce, communications & transportation
2
576 - Genetics & evolution
2
610 - Medicine & health
2
140 - Specific philosophical schools
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
370 - Education
1