Classification
330 - Economics
576 - Genetics & evolution
5
620 - Engineering & allied operations
720 - Architecture
600 - Technology
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
900 - History & geography
3
333 - Economics of land & energy
2
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
500 - Natural sciences & mathematics
2
658 - General management
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
530 - Physics
1
540 - Chemistry & allied sciences
1
800 - Literature & rhetoric
1