Classification
005 - Computer programming, programs & data
196
006 - Special computer methods
163
658 - General management
159
320 - Political science
88
330 - Economics
88
900 - History & geography
79
004 - Data processing & computer science
67
620 - Engineering & allied operations
58
331 - Labor economics
57
338 - Production
48
333 - Economics of land & energy
47
304 - Factors affecting social behavior
44
340 - Law
43
300 - Social sciences
42
621 - Applied physics
41
500 - Natural sciences & mathematics
38
100 - Philosophy & psychology
37
570 - Life sciences; biology
37
302 - Social interaction
34
700 - The arts; fine & decorative arts
33
000 - Computer science, information & general works
32
200 - Religion
32
363 - Other social problems & services
32
616 - Diseases
32
305 - Social groups
30
306 - Culture & institutions
28
370 - Education
28
380 - Commerce, communications & transportation
26
610 - Medicine & health
26
301 - Sociology & anthropology
24
381 - Commerce
24
003 - Systems
23
374 - Adult education
23
551 - Geology, hydrology & meteorology
23
600 - Technology
22
617 - Surgery & related medical specialties
21
140 - Specific philosophical schools
20
327 - International relations
19
519 - Probabilities & applied mathematics
19
800 - Literature & rhetoric
19
332 - Financial economics
18
364 - Criminology
18
629 - Other branches of engineering
18
745 - Decorative arts
18
530 - Physics
17
303 - Social processes
16
384 - Communications; telecommunication
15
001 - Knowledge
14
362 - Social welfare problems & services
14
378 - Higher education
13
more ...