Classification
301 - Sociology & anthropology
378
306 - Culture & institutions
58
300 - Social sciences
56
304 - Factors affecting social behavior
42
320 - Political science
27
305 - Social groups
26
519 - Probabilities & applied mathematics
26
330 - Economics
24
302 - Social interaction
23
370 - Education
18
511 - General principles of mathematics
15
530 - Physics
15
610 - Medicine & health
15
006 - Special computer methods
14
658 - General management
13
150 - Psychology
11
333 - Economics of land & energy
9
501 - Philosophy & theory
9
910 - Geography & travel
9
004 - Data processing & computer science
8
364 - Criminology
7
577 - Ecology
7
616 - Diseases
7
005 - Computer programming, programs & data
6
338 - Production
6
003 - Systems
5
303 - Social processes
4
001 - Knowledge
3
344 - Labor, social, education & cultural law
3
371 - Schools & their activities; special education
3
515 - Analysis
3
570 - Life sciences; biology
3
612 - Human physiology
3
621 - Applied physics
3
650 - Management & auxiliary services
3
660 - Chemical engineering
3
100 - Philosophy & psychology
2
120 - Epistemology, causation & humankind
2
142 - Critical philosophy
2
307 - Communities
2
324 - The political process
2
340 - Law
2
361 - Social problems & social welfare in general
2
363 - Other social problems & services
2
374 - Adult education
2
378 - Higher education
2
407 - Education, research & related topics
2
418 - Standard usage & applied linguistics
2
551 - Geology, hydrology & meteorology
2
571 - Physiology & related subjects
2
more ...