Classification
330 - Economics
554
000 - Computer science, information & general works
529
320 - Political science
370
700 - The arts; fine & decorative arts
327
340 - Law
304
600 - Technology
273
900 - History & geography
262
333 - Economics of land & energy
243
620 - Engineering & allied operations
218
610 - Medicine & health
158
363 - Other social problems & services
150
380 - Commerce, communications & transportation
141
011 - Bibliographies
138
331 - Labor economics
102
140 - Specific philosophical schools
85
500 - Natural sciences & mathematics
74
580 - Plants (Botany)
70
004 - Data processing & computer science
67
576 - Genetics & evolution
64
658 - General management
61
551 - Geology, hydrology & meteorology
60
630 - Agriculture & related technologies
54
300 - Social sciences
48
530 - Physics
44
720 - Architecture
35
350 - Public administration & military science
33
370 - Education
33
820 - English & Old English literatures
33
384 - Communications; telecommunication
32
005 - Computer programming, programs & data
31
540 - Chemistry & allied sciences
31
581 - Specific topics in natural history
26
400 - Language
25
304 - Factors affecting social behavior
20
800 - Literature & rhetoric
20
979 - Great Basin & Pacific Slope region
20
414 - Phonology & phonetics
19
301 - Sociology & anthropology
18
410 - Linguistics
18
100 - Philosophy & psychology
17
338 - Production
17
006 - Special computer methods
13
336 - Public finance
13
200 - Religion
12
621 - Applied physics
12
332 - Financial economics
11
612 - Human physiology
11
780 - Music
11
973 - United States
11
975 - Southeastern United States
11
more ...