Classification
001 - Knowledge
14
003 - Systems
369
004 - Data processing & computer science
1,353
005 - Computer programming, programs & data
664
006 - Special computer methods
611
025 - Library operations
30
040 - [Unassigned]
19
053 - Serials in other Germanic languages
1
100 - Philosophy & psychology
1
107 - Education, research & related topics
1
113 - Cosmology
1
120 - Epistemology, causation & humankind
3
150 - Psychology
6
153 - Mental processes & intelligence
3
160 - Logic
3
300 - Social sciences
16
301 - Sociology & anthropology
3
303 - Social processes
1
304 - Factors affecting social behavior
6
306 - Culture & institutions
1
307 - Communities
1
320 - Political science
1
330 - Economics
53
332 - Financial economics
10
333 - Economics of land & energy
17
338 - Production
4
344 - Labor, social, education & cultural law
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
3
364 - Criminology
1
368 - Insurance
2
370 - Education
3
371 - Schools & their activities; special education
1
381 - Commerce
1
410 - Linguistics
1
418 - Standard usage & applied linguistics
2
500 - Natural sciences & mathematics
34
501 - Philosophy & theory
25
507 - Education, research & related topics
2
509 - Historical, geographic & persons treatment
4
510 - Mathematics
96
511 - General principles of mathematics
129
512 - Algebra
134
514 - Topology
22
515 - Analysis
526
516 - Geometry
106
518 - Numerical analysis
559
519 - Probabilities & applied mathematics
927
520 - Astronomy & allied sciences
57
523 - Specific celestial bodies & phenomena
59
more ...