Classification
600 - Technology
1,367
658 - General management
297
005 - Computer programming, programs & data
244
006 - Special computer methods
226
330 - Economics
200
900 - History & geography
138
320 - Political science
115
621 - Applied physics
107
620 - Engineering & allied operations
97
331 - Labor economics
93
338 - Production
90
300 - Social sciences
83
340 - Law
80
500 - Natural sciences & mathematics
79
004 - Data processing & computer science
76
100 - Philosophy & psychology
71
370 - Education
68
302 - Social interaction
61
333 - Economics of land & energy
58
200 - Religion
54
304 - Factors affecting social behavior
53
700 - The arts; fine & decorative arts
46
610 - Medicine & health
44
306 - Culture & institutions
43
305 - Social groups
42
363 - Other social problems & services
41
616 - Diseases
41
000 - Computer science, information & general works
36
650 - Management & auxiliary services
36
332 - Financial economics
35
003 - Systems
34
301 - Sociology & anthropology
34
519 - Probabilities & applied mathematics
33
800 - Literature & rhetoric
32
384 - Communications; telecommunication
30
140 - Specific philosophical schools
29
153 - Mental processes & intelligence
29
380 - Commerce, communications & transportation
28
530 - Physics
27
158 - Applied psychology
26
551 - Geology, hydrology & meteorology
26
303 - Social processes
25
617 - Surgery & related medical specialties
25
362 - Social welfare problems & services
22
381 - Commerce
22
570 - Life sciences; biology
22
670 - Manufacturing
22
170 - Ethics
21
327 - International relations
21
364 - Criminology
21
more ...