Classification
005 - Computer programming, programs & data
795
004 - Data processing & computer science
567
303 - Social processes
261
006 - Special computer methods
204
371 - Schools & their activities; special education
43
621 - Applied physics
33
381 - Commerce
23
003 - Systems
22
658 - General management
21
610 - Medicine & health
15
025 - Library operations
14
300 - Social sciences
14
302 - Social interaction
13
620 - Engineering & allied operations
13
343 - Military, tax, trade & industrial law
10
320 - Political science
7
000 - Computer science, information & general works
6
301 - Sociology & anthropology
6
020 - Library & information sciences
5
650 - Management & auxiliary services
5
323 - Civil & political rights
4
330 - Economics
4
338 - Production
4
306 - Culture & institutions
3
341 - Law of nations
3
351 - Public administration
3
629 - Other branches of engineering
3
331 - Labor economics
2
332 - Financial economics
2
340 - Law
2
342 - Constitutional & administrative law
2
384 - Communications; telecommunication
2
601 - Philosophy & theory
2
745 - Decorative arts
2
001 - Knowledge
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
153 - Mental processes & intelligence
1
170 - Ethics
1
174 - Occupational ethics
1
200 - Religion
1
304 - Factors affecting social behavior
1
327 - International relations
1
339 - Macroeconomics & related topics
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
374 - Adult education
1
407 - Education, research & related topics
1
500 - Natural sciences & mathematics
1
509 - Historical, geographic & persons treatment
1
more ...