Classification
330 - Economics
557
320 - Political science
423
380 - Commerce, communications & transportation
308
340 - Law
160
700 - The arts; fine & decorative arts
120
600 - Technology
97
900 - History & geography
94
620 - Engineering & allied operations
87
333 - Economics of land & energy
67
363 - Other social problems & services
62
000 - Computer science, information & general works
58
610 - Medicine & health
36
140 - Specific philosophical schools
34
551 - Geology, hydrology & meteorology
21
630 - Agriculture & related technologies
20
658 - General management
18
580 - Plants (Botany)
17
576 - Genetics & evolution
15
370 - Education
12
720 - Architecture
11
800 - Literature & rhetoric
11
414 - Phonology & phonetics
10
581 - Specific topics in natural history
10
388 - Transportation; ground transportation
9
500 - Natural sciences & mathematics
9
300 - Social sciences
8
612 - Human physiology
5
680 - Manufacture for specific uses
4
100 - Philosophy & psychology
3
200 - Religion
3
410 - Linguistics
3
520 - Astronomy & allied sciences
3
550 - Earth sciences
3
625 - Engineering of railroads & roads
3
910 - Geography & travel
3
917 - Geography of & travel in North America
3
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
400 - Language
2
530 - Physics
2
540 - Chemistry & allied sciences
2
650 - Management & auxiliary services
2
820 - English & Old English literatures
2
940 - History of Europe
2
945 - Italian Peninsula & adjacent islands
2
025 - Library operations
1
120 - Epistemology, causation & humankind
1
170 - Ethics
1
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