Classification
380 - Commerce, communications & transportation
600 - Technology
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
199
900 - History & geography
185
333 - Economics of land & energy
157
000 - Computer science, information & general works
105
363 - Other social problems & services
81
330 - Economics
75
610 - Medicine & health
58
140 - Specific philosophical schools
48
320 - Political science
39
576 - Genetics & evolution
38
720 - Architecture
36
370 - Education
29
580 - Plants (Botany)
28
500 - Natural sciences & mathematics
24
630 - Agriculture & related technologies
23
551 - Geology, hydrology & meteorology
18
340 - Law
17
658 - General management
17
400 - Language
15
800 - Literature & rhetoric
13
300 - Social sciences
11
530 - Physics
11
304 - Factors affecting social behavior
10
414 - Phonology & phonetics
10
540 - Chemistry & allied sciences
10
100 - Philosophy & psychology
7
581 - Specific topics in natural history
7
612 - Human physiology
7
200 - Religion
5
780 - Music
5
170 - Ethics
4
361 - Social problems & social welfare in general
4
301 - Sociology & anthropology
3
410 - Linguistics
3
657 - Accounting
3
520 - Astronomy & allied sciences
2
650 - Management & auxiliary services
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
336 - Public finance
1
791 - Public performances
1