Classification
330 - Economics
364
320 - Political science
330
340 - Law
120
380 - Commerce, communications & transportation
117
620 - Engineering & allied operations
80
900 - History & geography
74
820 - English & Old English literatures
63
600 - Technology
55
700 - The arts; fine & decorative arts
47
910 - Geography & travel
41
333 - Economics of land & energy
31
000 - Computer science, information & general works
30
363 - Other social problems & services
28
610 - Medicine & health
21
551 - Geology, hydrology & meteorology
13
658 - General management
13
387 - Water, air & space transportation
11
140 - Specific philosophical schools
9
500 - Natural sciences & mathematics
9
300 - Social sciences
8
576 - Genetics & evolution
7
360 - Social problems & services; associations
6
580 - Plants (Botany)
6
623 - Military & nautical engineering
6
800 - Literature & rhetoric
6
970 - History of North America
5
010 - Bibliography
4
304 - Factors affecting social behavior
4
341 - Law of nations
4
370 - Education
4
410 - Linguistics
4
530 - Physics
4
650 - Management & auxiliary services
4
720 - Architecture
4
343 - Military, tax, trade & industrial law
3
344 - Labor, social, education & cultural law
3
400 - Language
3
550 - Earth sciences
3
621 - Applied physics
3
630 - Agriculture & related technologies
3
670 - Manufacturing
3
940 - History of Europe
3
170 - Ethics
2
200 - Religion
2
260 - Social & ecclesiastical theology
2
302 - Social interaction
2
350 - Public administration & military science
2
390 - Customs, etiquette & folklore
2
414 - Phonology & phonetics
2
581 - Specific topics in natural history
2
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