Classification
000 - Computer science, information & general works
330 - Economics
363 - Other social problems & services
600 - Technology
333 - Economics of land & energy
58
620 - Engineering & allied operations
40
700 - The arts; fine & decorative arts
38
380 - Commerce, communications & transportation
25
900 - History & geography
24
320 - Political science
20
551 - Geology, hydrology & meteorology
19
140 - Specific philosophical schools
15
610 - Medicine & health
15
580 - Plants (Botany)
14
630 - Agriculture & related technologies
14
658 - General management
13
370 - Education
10
720 - Architecture
9
576 - Genetics & evolution
8
340 - Law
7
800 - Literature & rhetoric
6
400 - Language
5
581 - Specific topics in natural history
4
657 - Accounting
4
300 - Social sciences
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
100 - Philosophy & psychology
2
200 - Religion
2
304 - Factors affecting social behavior
2
530 - Physics
2
540 - Chemistry & allied sciences
2
160 - Logic
1
170 - Ethics
1
297 - Islam, Babism & Bahai Faith
1
361 - Social problems & social welfare in general
1