Classification
658 - General management
259
005 - Computer programming, programs & data
232
006 - Special computer methods
202
330 - Economics
187
320 - Political science
90
331 - Labor economics
86
620 - Engineering & allied operations
86
338 - Production
82
900 - History & geography
78
500 - Natural sciences & mathematics
76
004 - Data processing & computer science
73
300 - Social sciences
59
302 - Social interaction
55
621 - Applied physics
50
333 - Economics of land & energy
47
304 - Factors affecting social behavior
45
340 - Law
43
100 - Philosophy & psychology
37
650 - Management & auxiliary services
34
610 - Medicine & health
33
200 - Religion
32
332 - Financial economics
32
616 - Diseases
32
363 - Other social problems & services
31
519 - Probabilities & applied mathematics
31
700 - The arts; fine & decorative arts
31
305 - Social groups
30
153 - Mental processes & intelligence
29
384 - Communications; telecommunication
29
306 - Culture & institutions
28
370 - Education
28
000 - Computer science, information & general works
27
003 - Systems
25
380 - Commerce, communications & transportation
25
551 - Geology, hydrology & meteorology
23
301 - Sociology & anthropology
22
570 - Life sciences; biology
22
364 - Criminology
21
617 - Surgery & related medical specialties
21
800 - Literature & rhetoric
21
140 - Specific philosophical schools
20
303 - Social processes
20
374 - Adult education
20
381 - Commerce
20
327 - International relations
19
600 - Technology
19
158 - Applied psychology
18
530 - Physics
18
629 - Other branches of engineering
18
670 - Manufacturing
18
more ...