Classification
303 - Social processes
147
306 - Culture & institutions
44
304 - Factors affecting social behavior
28
600 - Technology
28
300 - Social sciences
27
302 - Social interaction
16
301 - Sociology & anthropology
14
620 - Engineering & allied operations
14
320 - Political science
11
333 - Economics of land & energy
11
305 - Social groups
9
900 - History & geography
9
361 - Social problems & social welfare in general
7
500 - Natural sciences & mathematics
7
610 - Medicine & health
7
621 - Applied physics
7
006 - Special computer methods
6
070 - News media, journalism & publishing
5
100 - Philosophy & psychology
5
380 - Commerce, communications & transportation
5
000 - Computer science, information & general works
4
004 - Data processing & computer science
3
140 - Specific philosophical schools
3
307 - Communities
3
363 - Other social problems & services
3
364 - Criminology
3
370 - Education
3
530 - Physics
3
700 - The arts; fine & decorative arts
3
170 - Ethics
2
327 - International relations
2
330 - Economics
2
338 - Production
2
519 - Probabilities & applied mathematics
2
520 - Astronomy & allied sciences
2
551 - Geology, hydrology & meteorology
2
571 - Physiology & related subjects
2
576 - Genetics & evolution
2
601 - Philosophy & theory
2
614 - Incidence & prevention of disease
2
630 - Agriculture & related technologies
2
658 - General management
2
005 - Computer programming, programs & data
1
120 - Epistemology, causation & humankind
1
150 - Psychology
1
160 - Logic
1
360 - Social problems & services; associations
1
418 - Standard usage & applied linguistics
1
507 - Education, research & related topics
1
509 - Historical, geographic & persons treatment
1
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