Classification
000 - Computer science, information & general works
330 - Economics
576 - Genetics & evolution
333 - Economics of land & energy
36
600 - Technology
34
700 - The arts; fine & decorative arts
33
363 - Other social problems & services
24
380 - Commerce, communications & transportation
19
620 - Engineering & allied operations
18
900 - History & geography
14
140 - Specific philosophical schools
13
320 - Political science
11
500 - Natural sciences & mathematics
10
658 - General management
9
720 - Architecture
9
580 - Plants (Botany)
8
610 - Medicine & health
8
304 - Factors affecting social behavior
7
340 - Law
6
370 - Education
5
400 - Language
5
551 - Geology, hydrology & meteorology
5
800 - Literature & rhetoric
5
540 - Chemistry & allied sciences
4
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
414 - Phonology & phonetics
3
530 - Physics
3
630 - Agriculture & related technologies
3
297 - Islam, Babism & Bahai Faith
2
410 - Linguistics
2
657 - Accounting
2
160 - Logic
1
300 - Social sciences
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1