Classification
005 - Computer programming, programs & data
528
006 - Special computer methods
234
004 - Data processing & computer science
197
658 - General management
98
621 - Applied physics
83
040 - [Unassigned]
61
003 - Systems
52
332 - Financial economics
41
330 - Economics
32
338 - Production
28
518 - Numerical analysis
24
519 - Probabilities & applied mathematics
21
620 - Engineering & allied operations
19
629 - Other branches of engineering
17
304 - Factors affecting social behavior
16
343 - Military, tax, trade & industrial law
16
624 - Civil engineering
15
670 - Manufacturing
15
333 - Economics of land & energy
14
370 - Education
14
340 - Law
13
339 - Macroeconomics & related topics
12
336 - Public finance
10
025 - Library operations
9
306 - Culture & institutions
9
371 - Schools & their activities; special education
9
381 - Commerce
9
337 - International economics
8
657 - Accounting
8
570 - Life sciences; biology
7
610 - Medicine & health
7
650 - Management & auxiliary services
7
690 - Buildings
7
303 - Social processes
6
320 - Political science
6
363 - Other social problems & services
6
616 - Diseases
6
327 - International relations
5
530 - Physics
5
910 - Geography & travel
5
300 - Social sciences
4
301 - Sociology & anthropology
4
305 - Social groups
4
401 - Philosophy & theory
4
046 - [Unassigned]
3
150 - Psychology
3
155 - Differential & developmental psychology
3
302 - Social interaction
3
321 - Systems of governments & states
3
323 - Civil & political rights
3
more ...