Classification
005 - Computer programming, programs & data
1,963
004 - Data processing & computer science
1,357
374 - Adult education
959
331 - Labor economics
603
658 - General management
564
500 - Natural sciences & mathematics
489
000 - Computer science, information & general works
444
620 - Engineering & allied operations
233
006 - Special computer methods
170
384 - Communications; telecommunication
145
330 - Economics
140
621 - Applied physics
83
300 - Social sciences
65
338 - Production
57
745 - Decorative arts
50
303 - Social processes
49
381 - Commerce
35
003 - Systems
32
302 - Social interaction
29
519 - Probabilities & applied mathematics
27
670 - Manufacturing
27
025 - Library operations
18
510 - Mathematics
17
518 - Numerical analysis
15
332 - Financial economics
11
600 - Technology
9
610 - Medicine & health
9
629 - Other branches of engineering
9
001 - Knowledge
8
371 - Schools & their activities; special education
8
650 - Management & auxiliary services
8
363 - Other social problems & services
5
153 - Mental processes & intelligence
4
343 - Military, tax, trade & industrial law
4
346 - Private law
4
361 - Social problems & social welfare in general
4
570 - Life sciences; biology
4
700 - The arts; fine & decorative arts
4
808 - Rhetoric & collections of literature
4
070 - News media, journalism & publishing
3
333 - Economics of land & energy
3
380 - Commerce, communications & transportation
3
410 - Linguistics
3
794 - Indoor games of skill
3
041 - [Unassigned]
2
158 - Applied psychology
2
170 - Ethics
2
174 - Occupational ethics
2
320 - Political science
2
323 - Civil & political rights
2
more ...