Classification
330 - Economics
194
600 - Technology
49
700 - The arts; fine & decorative arts
48
380 - Commerce, communications & transportation
43
620 - Engineering & allied operations
41
900 - History & geography
40
610 - Medicine & health
30
140 - Specific philosophical schools
29
000 - Computer science, information & general works
27
363 - Other social problems & services
27
333 - Economics of land & energy
26
500 - Natural sciences & mathematics
11
576 - Genetics & evolution
11
340 - Law
10
100 - Philosophy & psychology
9
580 - Plants (Botany)
9
320 - Political science
8
630 - Agriculture & related technologies
8
370 - Education
7
551 - Geology, hydrology & meteorology
7
581 - Specific topics in natural history
7
720 - Architecture
7
300 - Social sciences
6
540 - Chemistry & allied sciences
6
400 - Language
5
414 - Phonology & phonetics
5
658 - General management
5
800 - Literature & rhetoric
5
170 - Ethics
4
530 - Physics
4
612 - Human physiology
4
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
200 - Religion
1
302 - Social interaction
1
410 - Linguistics
1
520 - Astronomy & allied sciences
1
615 - Pharmacology & therapeutics
1
629 - Other branches of engineering
1
770 - Photography, photographs & computer art
1
780 - Music
1