Classification
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
600 - Technology
42
333 - Economics of land & energy
36
330 - Economics
32
900 - History & geography
32
363 - Other social problems & services
30
620 - Engineering & allied operations
30
000 - Computer science, information & general works
28
610 - Medicine & health
24
140 - Specific philosophical schools
21
320 - Political science
17
370 - Education
13
658 - General management
13
576 - Genetics & evolution
12
720 - Architecture
12
551 - Geology, hydrology & meteorology
11
500 - Natural sciences & mathematics
10
580 - Plants (Botany)
9
340 - Law
6
400 - Language
6
800 - Literature & rhetoric
6
630 - Agriculture & related technologies
5
300 - Social sciences
4
170 - Ethics
3
304 - Factors affecting social behavior
3
612 - Human physiology
3
791 - Public performances
3
361 - Social problems & social welfare in general
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
657 - Accounting
2
780 - Music
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
350 - Public administration & military science
1
410 - Linguistics
1
530 - Physics
1
650 - Management & auxiliary services
1