Classification
301 - Sociology & anthropology
22
501 - Philosophy & theory
17
330 - Economics
11
155 - Differential & developmental psychology
9
300 - Social sciences
8
614 - Incidence & prevention of disease
7
320 - Political science
6
616 - Diseases
6
304 - Factors affecting social behavior
5
610 - Medicine & health
5
150 - Psychology
4
333 - Economics of land & energy
4
613 - Personal health & safety
4
900 - History & geography
4
004 - Data processing & computer science
3
170 - Ethics
3
337 - International economics
3
370 - Education
3
620 - Engineering & allied operations
3
658 - General management
3
001 - Knowledge
2
050 - General serial publications
2
100 - Philosophy & psychology
2
302 - Social interaction
2
306 - Culture & institutions
2
338 - Production
2
510 - Mathematics
2
530 - Physics
2
577 - Ecology
2
003 - Systems
1
005 - Computer programming, programs & data
1
126 - The self
1
142 - Critical philosophy
1
200 - Religion
1
305 - Social groups
1
331 - Labor economics
1
363 - Other social problems & services
1
507 - Education, research & related topics
1
518 - Numerical analysis
1
519 - Probabilities & applied mathematics
1
570 - Life sciences; biology
1
580 - Plants (Botany)
1
601 - Philosophy & theory
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
636 - Animal husbandry
1
650 - Management & auxiliary services
1