Classification
300 - Social sciences
662
306 - Culture & institutions
598
305 - Social groups
550
361 - Social problems & social welfare in general
513
301 - Sociology & anthropology
418
304 - Factors affecting social behavior
203
320 - Political science
185
302 - Social interaction
172
370 - Education
157
150 - Psychology
122
658 - General management
112
519 - Probabilities & applied mathematics
91
155 - Differential & developmental psychology
73
330 - Economics
69
158 - Applied psychology
59
344 - Labor, social, education & cultural law
49
616 - Diseases
42
650 - Management & auxiliary services
34
610 - Medicine & health
33
174 - Occupational ethics
32
001 - Knowledge
27
307 - Communities
26
303 - Social processes
25
338 - Production
25
372 - Elementary education
19
070 - News media, journalism & publishing
18
620 - Engineering & allied operations
18
530 - Physics
17
327 - International relations
16
371 - Schools & their activities; special education
16
571 - Physiology & related subjects
16
364 - Criminology
15
340 - Law
14
006 - Special computer methods
11
510 - Mathematics
11
570 - Life sciences; biology
11
005 - Computer programming, programs & data
10
346 - Private law
10
379 - Public policy issues in education
10
362 - Social welfare problems & services
9
613 - Personal health & safety
9
621 - Applied physics
9
374 - Adult education
8
659 - Advertising & public relations
8
004 - Data processing & computer science
7
614 - Incidence & prevention of disease
7
107 - Education, research & related topics
6
333 - Economics of land & energy
6
368 - Insurance
6
378 - Higher education
6
more ...