Classification
000 - Computer science, information & general works
9
003 - Systems
4
004 - Data processing & computer science
23
005 - Computer programming, programs & data
27
006 - Special computer methods
6
025 - Library operations
2
100 - Philosophy & psychology
2
140 - Specific philosophical schools
5
153 - Mental processes & intelligence
2
158 - Applied psychology
3
174 - Occupational ethics
1
300 - Social sciences
11
301 - Sociology & anthropology
4
302 - Social interaction
6
303 - Social processes
1
304 - Factors affecting social behavior
9
305 - Social groups
1
306 - Culture & institutions
9
307 - Communities
3
320 - Political science
13
330 - Economics
53
331 - Labor economics
8
332 - Financial economics
1
333 - Economics of land & energy
13
338 - Production
16
340 - Law
4
343 - Military, tax, trade & industrial law
2
346 - Private law
1
351 - Public administration
1
353 - Specific fields of public administration
2
363 - Other social problems & services
6
364 - Criminology
1
370 - Education
4
380 - Commerce, communications & transportation
11
381 - Commerce
2
384 - Communications; telecommunication
2
400 - Language
1
500 - Natural sciences & mathematics
3
570 - Life sciences; biology
1
576 - Genetics & evolution
3
600 - Technology
5
601 - Philosophy & theory
1
610 - Medicine & health
2
620 - Engineering & allied operations
4
629 - Other branches of engineering
1
650 - Management & auxiliary services
3
657 - Accounting
1
658 - General management
21
659 - Advertising & public relations
2
670 - Manufacturing
1
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