Classification
000 - Computer science, information & general works
600 - Technology
700 - The arts; fine & decorative arts
63
333 - Economics of land & energy
54
330 - Economics
47
620 - Engineering & allied operations
40
363 - Other social problems & services
30
900 - History & geography
27
380 - Commerce, communications & transportation
23
576 - Genetics & evolution
20
140 - Specific philosophical schools
19
610 - Medicine & health
16
320 - Political science
13
370 - Education
13
630 - Agriculture & related technologies
12
720 - Architecture
12
580 - Plants (Botany)
9
300 - Social sciences
8
400 - Language
7
551 - Geology, hydrology & meteorology
7
658 - General management
6
100 - Philosophy & psychology
5
500 - Natural sciences & mathematics
5
581 - Specific topics in natural history
5
530 - Physics
4
340 - Law
3
657 - Accounting
3
800 - Literature & rhetoric
3
170 - Ethics
2
200 - Religion
2
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
410 - Linguistics
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
361 - Social problems & social welfare in general
1
414 - Phonology & phonetics
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
780 - Music
1