Classification
330 - Economics
700 - The arts; fine & decorative arts
333 - Economics of land & energy
74
600 - Technology
71
000 - Computer science, information & general works
48
363 - Other social problems & services
44
620 - Engineering & allied operations
38
900 - History & geography
33
380 - Commerce, communications & transportation
32
320 - Political science
30
610 - Medicine & health
23
658 - General management
22
140 - Specific philosophical schools
17
370 - Education
15
551 - Geology, hydrology & meteorology
13
576 - Genetics & evolution
13
580 - Plants (Botany)
13
500 - Natural sciences & mathematics
11
720 - Architecture
11
630 - Agriculture & related technologies
10
400 - Language
8
300 - Social sciences
6
800 - Literature & rhetoric
6
100 - Philosophy & psychology
5
340 - Law
5
530 - Physics
4
581 - Specific topics in natural history
4
170 - Ethics
3
297 - Islam, Babism & Bahai Faith
3
304 - Factors affecting social behavior
3
350 - Public administration & military science
3
361 - Social problems & social welfare in general
3
540 - Chemistry & allied sciences
3
657 - Accounting
3
160 - Logic
2
200 - Religion
2
301 - Sociology & anthropology
2
410 - Linguistics
2
414 - Phonology & phonetics
2
520 - Astronomy & allied sciences
2
612 - Human physiology
2
360 - Social problems & services; associations
1
650 - Management & auxiliary services
1
791 - Public performances
1