Classification
150 - Psychology
2,003
616 - Diseases
1,737
158 - Applied psychology
1,395
100 - Philosophy & psychology
1,351
658 - General management
1,111
155 - Differential & developmental psychology
1,094
370 - Education
905
330 - Economics
822
302 - Social interaction
683
610 - Medicine & health
682
153 - Mental processes & intelligence
629
300 - Social sciences
446
306 - Culture & institutions
427
500 - Natural sciences & mathematics
372
650 - Management & auxiliary services
350
612 - Human physiology
293
301 - Sociology & anthropology
259
617 - Surgery & related medical specialties
241
331 - Labor economics
238
305 - Social groups
231
333 - Economics of land & energy
196
700 - The arts; fine & decorative arts
195
320 - Political science
192
613 - Personal health & safety
165
384 - Communications; telecommunication
158
371 - Schools & their activities; special education
155
338 - Production
142
006 - Special computer methods
141
000 - Computer science, information & general works
138
614 - Incidence & prevention of disease
134
900 - History & geography
129
170 - Ethics
121
380 - Commerce, communications & transportation
119
152 - Perception, movement, emotions & drives
116
620 - Engineering & allied operations
110
004 - Data processing & computer science
105
381 - Commerce
105
340 - Law
103
361 - Social problems & social welfare in general
102
364 - Criminology
97
140 - Specific philosophical schools
95
303 - Social processes
92
400 - Language
92
332 - Financial economics
88
363 - Other social problems & services
88
600 - Technology
85
005 - Computer programming, programs & data
80
570 - Life sciences; biology
75
618 - Gynecology, obstetrics, pediatrics & geriatrics
75
304 - Factors affecting social behavior
74
more ...