Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
284
333 - Economics of land & energy
136
330 - Economics
117
600 - Technology
95
700 - The arts; fine & decorative arts
86
000 - Computer science, information & general works
83
620 - Engineering & allied operations
69
320 - Political science
59
900 - History & geography
57
610 - Medicine & health
52
140 - Specific philosophical schools
40
551 - Geology, hydrology & meteorology
38
576 - Genetics & evolution
25
580 - Plants (Botany)
22
304 - Factors affecting social behavior
20
340 - Law
19
500 - Natural sciences & mathematics
19
658 - General management
16
720 - Architecture
15
370 - Education
13
630 - Agriculture & related technologies
13
414 - Phonology & phonetics
11
581 - Specific topics in natural history
11
800 - Literature & rhetoric
11
540 - Chemistry & allied sciences
9
336 - Public finance
8
530 - Physics
8
612 - Human physiology
7
300 - Social sciences
6
400 - Language
5
410 - Linguistics
4
550 - Earth sciences
3
657 - Accounting
3
100 - Philosophy & psychology
2
361 - Social problems & social welfare in general
2
650 - Management & auxiliary services
2
791 - Public performances
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
170 - Ethics
1
200 - Religion
1
364 - Criminology
1
615 - Pharmacology & therapeutics
1