Classification
330 - Economics
600 - Technology
333 - Economics of land & energy
74
700 - The arts; fine & decorative arts
69
363 - Other social problems & services
50
000 - Computer science, information & general works
47
620 - Engineering & allied operations
46
900 - History & geography
35
380 - Commerce, communications & transportation
25
320 - Political science
24
610 - Medicine & health
21
140 - Specific philosophical schools
19
370 - Education
18
576 - Genetics & evolution
17
658 - General management
15
580 - Plants (Botany)
12
630 - Agriculture & related technologies
10
500 - Natural sciences & mathematics
9
581 - Specific topics in natural history
9
720 - Architecture
9
551 - Geology, hydrology & meteorology
8
100 - Philosophy & psychology
7
300 - Social sciences
7
400 - Language
7
800 - Literature & rhetoric
6
340 - Law
5
657 - Accounting
5
350 - Public administration & military science
4
170 - Ethics
3
530 - Physics
3
297 - Islam, Babism & Bahai Faith
2
361 - Social problems & social welfare in general
2
410 - Linguistics
2
414 - Phonology & phonetics
2
791 - Public performances
2
160 - Logic
1
200 - Religion
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
650 - Management & auxiliary services
1
780 - Music
1