Classification
500 - Natural sciences & mathematics
658 - General management
197
330 - Economics
195
300 - Social sciences
151
302 - Social interaction
140
670 - Manufacturing
128
004 - Data processing & computer science
83
005 - Computer programming, programs & data
79
620 - Engineering & allied operations
73
331 - Labor economics
67
384 - Communications; telecommunication
39
338 - Production
37
381 - Commerce
32
520 - Astronomy & allied sciences
25
332 - Financial economics
24
006 - Special computer methods
23
000 - Computer science, information & general works
20
320 - Political science
19
363 - Other social problems & services
19
510 - Mathematics
15
370 - Education
14
600 - Technology
14
650 - Management & auxiliary services
14
700 - The arts; fine & decorative arts
14
158 - Applied psychology
13
333 - Economics of land & energy
13
745 - Decorative arts
13
100 - Philosophy & psychology
12
153 - Mental processes & intelligence
12
657 - Accounting
12
519 - Probabilities & applied mathematics
11
364 - Criminology
9
380 - Commerce, communications & transportation
9
352 - General considerations of public administration
8
368 - Insurance
7
900 - History & geography
7
001 - Knowledge
6
303 - Social processes
6
374 - Adult education
6
530 - Physics
5
720 - Architecture
5
025 - Library operations
4
410 - Linguistics
4
551 - Geology, hydrology & meteorology
4
610 - Medicine & health
4
621 - Applied physics
4
140 - Specific philosophical schools
3
160 - Logic
3
170 - Ethics
3
371 - Schools & their activities; special education
3
more ...