Classification
330 - Economics
212
320 - Political science
191
600 - Technology
56
900 - History & geography
56
700 - The arts; fine & decorative arts
52
620 - Engineering & allied operations
51
333 - Economics of land & energy
43
000 - Computer science, information & general works
42
580 - Plants (Botany)
22
363 - Other social problems & services
19
540 - Chemistry & allied sciences
18
610 - Medicine & health
12
380 - Commerce, communications & transportation
11
340 - Law
9
370 - Education
8
300 - Social sciences
6
400 - Language
6
500 - Natural sciences & mathematics
6
140 - Specific philosophical schools
5
530 - Physics
5
576 - Genetics & evolution
5
800 - Literature & rhetoric
5
304 - Factors affecting social behavior
4
551 - Geology, hydrology & meteorology
4
780 - Music
4
621 - Applied physics
3
100 - Philosophy & psychology
2
160 - Logic
2
630 - Agriculture & related technologies
2
658 - General management
2
720 - Architecture
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
361 - Social problems & social welfare in general
1
410 - Linguistics
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
541 - Physical chemistry
1
542 - Techniques, equipment & materials
1
590 - Animals (Zoology)
1
615 - Pharmacology & therapeutics
1
623 - Military & nautical engineering
1
657 - Accounting
1
661 - Industrial chemicals
1
690 - Buildings
1
820 - English & Old English literatures
1