Classification
520 - Astronomy & allied sciences
1,470
820 - English & Old English literatures
243
330 - Economics
152
320 - Political science
148
970 - History of North America
96
400 - Language
32
030 - General encyclopedic works
21
300 - Social sciences
10
130 - Parapsychology & occultism
9
650 - Management & auxiliary services
8
510 - Mathematics
7
630 - Agriculture & related technologies
6
332 - Financial economics
4
333 - Economics of land & energy
4
500 - Natural sciences & mathematics
3
700 - The arts; fine & decorative arts
3
840 - Literatures of Romance languages
3
900 - History & geography
3
940 - History of Europe
3
005 - Computer programming, programs & data
2
302 - Social interaction
2
306 - Culture & institutions
2
340 - Law
2
610 - Medicine & health
2
000 - Computer science, information & general works
1
001 - Knowledge
1
004 - Data processing & computer science
1
006 - Special computer methods
1
304 - Factors affecting social behavior
1
338 - Production
1
370 - Education
1
380 - Commerce, communications & transportation
1
381 - Commerce
1
390 - Customs, etiquette & folklore
1
410 - Linguistics
1
425 - English grammar
1
501 - Philosophy & theory
1
507 - Education, research & related topics
1
519 - Probabilities & applied mathematics
1
523 - Specific celestial bodies & phenomena
1
526 - Mathematical geography
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
620 - Engineering & allied operations
1
621 - Applied physics
1
658 - General management
1
670 - Manufacturing
1
680 - Manufacture for specific uses
1
745 - Decorative arts
1
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