Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
600 - Technology
333 - Economics of land & energy
34
700 - The arts; fine & decorative arts
26
363 - Other social problems & services
19
620 - Engineering & allied operations
18
380 - Commerce, communications & transportation
12
551 - Geology, hydrology & meteorology
12
900 - History & geography
11
140 - Specific philosophical schools
10
370 - Education
10
610 - Medicine & health
8
630 - Agriculture & related technologies
7
300 - Social sciences
6
658 - General management
6
657 - Accounting
5
580 - Plants (Botany)
4
581 - Specific topics in natural history
4
720 - Architecture
4
170 - Ethics
3
340 - Law
3
576 - Genetics & evolution
3
100 - Philosophy & psychology
2
530 - Physics
2
800 - Literature & rhetoric
2
297 - Islam, Babism & Bahai Faith
1
304 - Factors affecting social behavior
1
350 - Public administration & military science
1
361 - Social problems & social welfare in general
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
540 - Chemistry & allied sciences
1