Classification
000 - Computer science, information & general works
1,012
600 - Technology
1,004
700 - The arts; fine & decorative arts
974
610 - Medicine & health
966
333 - Economics of land & energy
844
330 - Economics
829
006 - Special computer methods
807
620 - Engineering & allied operations
777
900 - History & geography
581
005 - Computer programming, programs & data
569
004 - Data processing & computer science
516
363 - Other social problems & services
461
320 - Political science
447
140 - Specific philosophical schools
302
380 - Commerce, communications & transportation
291
580 - Plants (Botany)
289
658 - General management
285
621 - Applied physics
284
304 - Factors affecting social behavior
249
551 - Geology, hydrology & meteorology
231
370 - Education
215
340 - Law
180
820 - English & Old English literatures
158
576 - Genetics & evolution
156
530 - Physics
150
630 - Agriculture & related technologies
144
616 - Diseases
141
500 - Natural sciences & mathematics
135
300 - Social sciences
126
540 - Chemistry & allied sciences
121
629 - Other branches of engineering
94
338 - Production
84
720 - Architecture
78
800 - Literature & rhetoric
73
414 - Phonology & phonetics
72
100 - Philosophy & psychology
71
301 - Sociology & anthropology
66
519 - Probabilities & applied mathematics
66
612 - Human physiology
61
200 - Religion
60
306 - Culture & institutions
58
400 - Language
55
003 - Systems
52
581 - Specific topics in natural history
51
371 - Schools & their activities; special education
49
617 - Surgery & related medical specialties
47
910 - Geography & travel
46
336 - Public finance
45
515 - Analysis
45
670 - Manufacturing
44
more ...