Classification
000 - Computer science, information & general works
44
001 - Knowledge
7
004 - Data processing & computer science
7
005 - Computer programming, programs & data
57
006 - Special computer methods
23
011 - Bibliographies
1
025 - Library operations
1
100 - Philosophy & psychology
4
140 - Specific philosophical schools
8
150 - Psychology
7
153 - Mental processes & intelligence
4
158 - Applied psychology
30
160 - Logic
1
170 - Ethics
7
174 - Occupational ethics
1
200 - Religion
3
300 - Social sciences
76
301 - Sociology & anthropology
1
302 - Social interaction
78
303 - Social processes
2
306 - Culture & institutions
2
320 - Political science
79
330 - Economics
536
331 - Labor economics
54
332 - Financial economics
18
333 - Economics of land & energy
21
337 - International economics
2
338 - Production
55
339 - Macroeconomics & related topics
3
340 - Law
281
341 - Law of nations
1
343 - Military, tax, trade & industrial law
3
344 - Labor, social, education & cultural law
1
346 - Private law
8
350 - Public administration & military science
4
351 - Public administration
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
13
370 - Education
6
371 - Schools & their activities; special education
2
374 - Adult education
10
380 - Commerce, communications & transportation
41
381 - Commerce
485
382 - International commerce
1
384 - Communications; telecommunication
22
398 - Folklore
1
400 - Language
3
500 - Natural sciences & mathematics
65
510 - Mathematics
2
519 - Probabilities & applied mathematics
2
more ...