Classification
330 - Economics
600 - Technology
800 - Literature & rhetoric
700 - The arts; fine & decorative arts
22
333 - Economics of land & energy
18
363 - Other social problems & services
14
620 - Engineering & allied operations
13
900 - History & geography
13
000 - Computer science, information & general works
11
380 - Commerce, communications & transportation
10
610 - Medicine & health
8
320 - Political science
7
658 - General management
7
140 - Specific philosophical schools
6
576 - Genetics & evolution
6
580 - Plants (Botany)
5
720 - Architecture
4
370 - Education
3
400 - Language
3
551 - Geology, hydrology & meteorology
3
304 - Factors affecting social behavior
2
657 - Accounting
2
100 - Philosophy & psychology
1
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
336 - Public finance
1
361 - Social problems & social welfare in general
1
530 - Physics
1
540 - Chemistry & allied sciences
1