Classification
005 - Computer programming, programs & data
220
004 - Data processing & computer science
57
620 - Engineering & allied operations
51
006 - Special computer methods
50
621 - Applied physics
25
500 - Natural sciences & mathematics
22
410 - Linguistics
17
658 - General management
13
003 - Systems
11
401 - Philosophy & theory
8
331 - Labor economics
7
415 - Grammar
7
519 - Probabilities & applied mathematics
7
300 - Social sciences
6
330 - Economics
6
000 - Computer science, information & general works
5
001 - Knowledge
5
510 - Mathematics
5
511 - General principles of mathematics
5
160 - Logic
3
306 - Culture & institutions
3
518 - Numerical analysis
3
629 - Other branches of engineering
3
670 - Manufacturing
3
745 - Decorative arts
3
149 - Other philosophical systems
2
153 - Mental processes & intelligence
2
302 - Social interaction
2
332 - Financial economics
2
374 - Adult education
2
384 - Communications; telecommunication
2
400 - Language
2
414 - Phonology & phonetics
2
440 - Romance languages; French
2
495 - Languages of East & Southeast Asia
2
499 - Austronesian & other languages
2
534 - Sound & related vibrations
2
600 - Technology
2
610 - Medicine & health
2
612 - Human physiology
2
650 - Management & auxiliary services
2
794 - Indoor games of skill
2
070 - News media, journalism & publishing
1
150 - Psychology
1
221 - Old Testament (Tanakh)
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
338 - Production
1
340 - Law
1
370 - Education
1
more ...