Classification
000 - Computer science, information & general works
65
001 - Knowledge
40
003 - Systems
1
004 - Data processing & computer science
13
005 - Computer programming, programs & data
21
006 - Special computer methods
18
150 - Psychology
10
152 - Perception, movement, emotions & drives
6
153 - Mental processes & intelligence
107
155 - Differential & developmental psychology
4
158 - Applied psychology
126
170 - Ethics
12
174 - Occupational ethics
1
253 - Pastoral office & work
1
300 - Social sciences
1,394
302 - Social interaction
1,377
303 - Social processes
10
304 - Factors affecting social behavior
14
330 - Economics
1,563
331 - Labor economics
201
332 - Financial economics
61
333 - Economics of land & energy
1
334 - Cooperatives
1
337 - International economics
1
338 - Production
369
346 - Private law
1
352 - General considerations of public administration
1
361 - Social problems & social welfare in general
1
362 - Social welfare problems & services
2
363 - Other social problems & services
2
364 - Criminology
2
368 - Insurance
34
371 - Schools & their activities; special education
1
374 - Adult education
9
380 - Commerce, communications & transportation
60
381 - Commerce
222
382 - International commerce
1
384 - Communications; telecommunication
103
388 - Transportation; ground transportation
1
500 - Natural sciences & mathematics
1,367
510 - Mathematics
17
519 - Probabilities & applied mathematics
12
590 - Animals (Zoology)
1
600 - Technology
15
604 - Special topics
1
620 - Engineering & allied operations
94
621 - Applied physics
4
629 - Other branches of engineering
2
643 - Housing & household equipment
1
650 - Management & auxiliary services
146
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