Classification
300 - Social sciences
104
306 - Culture & institutions
101
301 - Sociology & anthropology
70
305 - Social groups
41
320 - Political science
29
304 - Factors affecting social behavior
20
930 - History of ancient world to ca. 499
19
302 - Social interaction
14
307 - Communities
10
361 - Social problems & social welfare in general
10
003 - Systems
7
303 - Social processes
7
370 - Education
6
155 - Differential & developmental psychology
5
610 - Medicine & health
5
006 - Special computer methods
4
338 - Production
4
378 - Higher education
4
150 - Psychology
3
330 - Economics
3
340 - Law
3
364 - Criminology
3
501 - Philosophy & theory
3
616 - Diseases
3
621 - Applied physics
3
005 - Computer programming, programs & data
2
142 - Critical philosophy
2
149 - Other philosophical systems
2
201 - Religious mythology & social theology
2
333 - Economics of land & energy
2
335 - Socialism & related systems
2
374 - Adult education
2
407 - Education, research & related topics
2
418 - Standard usage & applied linguistics
2
601 - Philosophy & theory
2
658 - General management
2
001 - Knowledge
1
002 - The book
1
004 - Data processing & computer science
1
030 - General encyclopedic works
1
036 - Encyclopedias in Spanish & Portuguese
1
061 - Organizations in North America
1
093 - Incunabula
1
100 - Philosophy & psychology
1
113 - Cosmology
1
120 - Epistemology, causation & humankind
1
140 - Specific philosophical schools
1
158 - Applied psychology
1
170 - Ethics
1
200 - Religion
1
more ...