Classification
330 - Economics
1,314
005 - Computer programming, programs & data
423
658 - General management
366
006 - Special computer methods
262
500 - Natural sciences & mathematics
140
004 - Data processing & computer science
137
331 - Labor economics
131
338 - Production
103
621 - Applied physics
91
320 - Political science
85
620 - Engineering & allied operations
83
304 - Factors affecting social behavior
64
745 - Decorative arts
60
374 - Adult education
56
333 - Economics of land & energy
54
384 - Communications; telecommunication
51
370 - Education
50
610 - Medicine & health
50
300 - Social sciences
47
363 - Other social problems & services
47
332 - Financial economics
46
381 - Commerce
43
380 - Commerce, communications & transportation
41
302 - Social interaction
39
510 - Mathematics
35
616 - Diseases
35
629 - Other branches of engineering
35
001 - Knowledge
31
340 - Law
29
003 - Systems
27
519 - Probabilities & applied mathematics
27
153 - Mental processes & intelligence
25
600 - Technology
25
650 - Management & auxiliary services
24
570 - Life sciences; biology
23
346 - Private law
21
000 - Computer science, information & general works
20
617 - Surgery & related medical specialties
19
327 - International relations
18
670 - Manufacturing
18
336 - Public finance
16
551 - Geology, hydrology & meteorology
16
306 - Culture & institutions
15
530 - Physics
15
511 - General principles of mathematics
13
150 - Psychology
12
158 - Applied psychology
12
303 - Social processes
12
371 - Schools & their activities; special education
12
515 - Analysis
11
more ...