Classification
900 - History & geography
600 - Technology
121
620 - Engineering & allied operations
111
700 - The arts; fine & decorative arts
106
333 - Economics of land & energy
88
330 - Economics
49
363 - Other social problems & services
45
380 - Commerce, communications & transportation
40
000 - Computer science, information & general works
36
610 - Medicine & health
33
370 - Education
27
320 - Political science
26
140 - Specific philosophical schools
24
576 - Genetics & evolution
23
720 - Architecture
21
580 - Plants (Botany)
19
100 - Philosophy & psychology
13
300 - Social sciences
13
400 - Language
13
500 - Natural sciences & mathematics
12
800 - Literature & rhetoric
11
340 - Law
10
658 - General management
10
551 - Geology, hydrology & meteorology
8
630 - Agriculture & related technologies
7
170 - Ethics
6
304 - Factors affecting social behavior
5
414 - Phonology & phonetics
5
530 - Physics
5
200 - Religion
3
301 - Sociology & anthropology
3
361 - Social problems & social welfare in general
3
410 - Linguistics
3
581 - Specific topics in natural history
3
780 - Music
3
540 - Chemistry & allied sciences
2
615 - Pharmacology & therapeutics
2
657 - Accounting
2
296 - Judaism
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
355 - Military science
1