Classification
000 - Computer science, information & general works
89
001 - Knowledge
4
003 - Systems
28
004 - Data processing & computer science
669
005 - Computer programming, programs & data
48
006 - Special computer methods
20
020 - Library & information sciences
1
100 - Philosophy & psychology
33
120 - Epistemology, causation & humankind
6
140 - Specific philosophical schools
18
153 - Mental processes & intelligence
5
158 - Applied psychology
1
160 - Logic
3
170 - Ethics
4
200 - Religion
5
300 - Social sciences
41
301 - Sociology & anthropology
4
302 - Social interaction
25
303 - Social processes
4
304 - Factors affecting social behavior
1
305 - Social groups
4
320 - Political science
14
330 - Economics
116
331 - Labor economics
209
332 - Financial economics
3
333 - Economics of land & energy
42
336 - Public finance
1
338 - Production
29
339 - Macroeconomics & related topics
2
340 - Law
23
341 - Law of nations
1
360 - Social problems & services; associations
1
361 - Social problems & social welfare in general
2
363 - Other social problems & services
23
364 - Criminology
2
368 - Insurance
1
370 - Education
14
371 - Schools & their activities; special education
4
374 - Adult education
28
378 - Higher education
1
380 - Commerce, communications & transportation
38
381 - Commerce
12
384 - Communications; telecommunication
102
400 - Language
6
410 - Linguistics
5
414 - Phonology & phonetics
1
500 - Natural sciences & mathematics
510 - Mathematics
34
511 - General principles of mathematics
4
515 - Analysis
1
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