Classification
330 - Economics
700 - The arts; fine & decorative arts
43
600 - Technology
41
000 - Computer science, information & general works
39
333 - Economics of land & energy
39
363 - Other social problems & services
26
620 - Engineering & allied operations
26
900 - History & geography
25
380 - Commerce, communications & transportation
24
610 - Medicine & health
19
658 - General management
17
370 - Education
15
140 - Specific philosophical schools
14
500 - Natural sciences & mathematics
14
320 - Political science
13
576 - Genetics & evolution
12
630 - Agriculture & related technologies
9
340 - Law
8
540 - Chemistry & allied sciences
7
720 - Architecture
7
530 - Physics
6
300 - Social sciences
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
304 - Factors affecting social behavior
4
410 - Linguistics
4
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
200 - Religion
3
361 - Social problems & social welfare in general
3
400 - Language
3
800 - Literature & rhetoric
3
170 - Ethics
2
301 - Sociology & anthropology
2
297 - Islam, Babism & Bahai Faith
1
302 - Social interaction
1
331 - Labor economics
1
338 - Production
1
350 - Public administration & military science
1
414 - Phonology & phonetics
1
612 - Human physiology
1
657 - Accounting
1
670 - Manufacturing
1
780 - Music
1