Classification
330 - Economics
576 - Genetics & evolution
700 - The arts; fine & decorative arts
900 - History & geography
600 - Technology
17
620 - Engineering & allied operations
17
333 - Economics of land & energy
12
000 - Computer science, information & general works
11
320 - Political science
11
720 - Architecture
7
380 - Commerce, communications & transportation
5
500 - Natural sciences & mathematics
4
580 - Plants (Botany)
4
610 - Medicine & health
4
658 - General management
4
800 - Literature & rhetoric
4
340 - Law
3
363 - Other social problems & services
3
140 - Specific philosophical schools
2
304 - Factors affecting social behavior
2
370 - Education
2
530 - Physics
2
540 - Chemistry & allied sciences
2
100 - Philosophy & psychology
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
630 - Agriculture & related technologies
1
791 - Public performances
1