Classification
330 - Economics
380 - Commerce, communications & transportation
658 - General management
600 - Technology
19
333 - Economics of land & energy
18
363 - Other social problems & services
18
700 - The arts; fine & decorative arts
18
000 - Computer science, information & general works
16
320 - Political science
14
610 - Medicine & health
13
140 - Specific philosophical schools
9
370 - Education
9
620 - Engineering & allied operations
7
900 - History & geography
7
576 - Genetics & evolution
6
340 - Law
5
551 - Geology, hydrology & meteorology
5
580 - Plants (Botany)
5
720 - Architecture
4
400 - Language
3
530 - Physics
3
630 - Agriculture & related technologies
3
800 - Literature & rhetoric
3
100 - Philosophy & psychology
2
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
300 - Social sciences
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
500 - Natural sciences & mathematics
2
336 - Public finance
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
780 - Music
1
791 - Public performances
1