Classification
006 - Special computer methods
261
005 - Computer programming, programs & data
251
820 - English & Old English literatures
188
658 - General management
177
610 - Medicine & health
163
004 - Data processing & computer science
156
330 - Economics
153
621 - Applied physics
143
617 - Surgery & related medical specialties
121
616 - Diseases
96
620 - Engineering & allied operations
94
300 - Social sciences
67
700 - The arts; fine & decorative arts
65
340 - Law
56
000 - Computer science, information & general works
52
900 - History & geography
50
320 - Political science
49
600 - Technology
46
302 - Social interaction
43
500 - Natural sciences & mathematics
42
612 - Human physiology
36
650 - Management & auxiliary services
35
003 - Systems
34
333 - Economics of land & energy
34
370 - Education
33
150 - Psychology
32
331 - Labor economics
31
570 - Life sciences; biology
29
629 - Other branches of engineering
29
780 - Music
28
380 - Commerce, communications & transportation
27
338 - Production
26
615 - Pharmacology & therapeutics
26
519 - Probabilities & applied mathematics
25
670 - Manufacturing
25
100 - Philosophy & psychology
23
153 - Mental processes & intelligence
23
360 - Social problems & services; associations
23
158 - Applied psychology
21
800 - Literature & rhetoric
21
304 - Factors affecting social behavior
20
571 - Physiology & related subjects
20
301 - Sociology & anthropology
19
363 - Other social problems & services
19
745 - Decorative arts
19
381 - Commerce
18
306 - Culture & institutions
17
332 - Financial economics
16
576 - Genetics & evolution
16
910 - Geography & travel
16
more ...