Classification
658 - General management
3,278
670 - Manufacturing
2,033
330 - Economics
1,733
302 - Social interaction
1,446
300 - Social sciences
1,438
500 - Natural sciences & mathematics
1,423
338 - Production
507
690 - Buildings
262
381 - Commerce
247
331 - Labor economics
232
624 - Civil engineering
230
650 - Management & auxiliary services
212
620 - Engineering & allied operations
184
629 - Other branches of engineering
174
158 - Applied psychology
144
384 - Communications; telecommunication
134
621 - Applied physics
123
153 - Mental processes & intelligence
117
000 - Computer science, information & general works
97
003 - Systems
97
380 - Commerce, communications & transportation
85
332 - Financial economics
78
006 - Special computer methods
77
333 - Economics of land & energy
73
005 - Computer programming, programs & data
56
001 - Knowledge
46
745 - Decorative arts
41
004 - Data processing & computer science
39
304 - Factors affecting social behavior
38
368 - Insurance
35
519 - Probabilities & applied mathematics
24
343 - Military, tax, trade & industrial law
22
174 - Occupational ethics
21
303 - Social processes
20
363 - Other social problems & services
19
170 - Ethics
18
510 - Mathematics
18
340 - Law
17
659 - Advertising & public relations
16
691 - Building materials
15
352 - General considerations of public administration
14
374 - Adult education
12
150 - Psychology
11
660 - Chemical engineering
11
700 - The arts; fine & decorative arts
11
720 - Architecture
11
370 - Education
10
600 - Technology
10
346 - Private law
9
610 - Medicine & health
9
more ...