Classification
613 - Personal health & safety
165
614 - Incidence & prevention of disease
143
616 - Diseases
74
610 - Medicine & health
54
571 - Physiology & related subjects
22
006 - Special computer methods
16
618 - Gynecology, obstetrics, pediatrics & geriatrics
12
612 - Human physiology
11
306 - Culture & institutions
10
615 - Pharmacology & therapeutics
9
362 - Social welfare problems & services
8
570 - Life sciences; biology
8
617 - Surgery & related medical specialties
8
003 - Systems
7
641 - Food & drink
6
664 - Food technology
6
304 - Factors affecting social behavior
5
621 - Applied physics
5
910 - Geography & travel
5
158 - Applied psychology
4
174 - Occupational ethics
4
301 - Sociology & anthropology
4
320 - Political science
4
170 - Ethics
3
330 - Economics
3
572 - Biochemistry
3
620 - Engineering & allied operations
3
155 - Differential & developmental psychology
2
307 - Communities
2
333 - Economics of land & energy
2
338 - Production
2
363 - Other social problems & services
2
551 - Geology, hydrology & meteorology
2
577 - Ecology
2
631 - Techniques, equipment & materials
2
658 - General management
2
660 - Chemical engineering
2
796 - Athletic & outdoor sports & games
2
004 - Data processing & computer science
1
030 - General encyclopedic works
1
057 - Serials in Slavic languages
1
061 - Organizations in North America
1
150 - Psychology
1
303 - Social processes
1
305 - Social groups
1
336 - Public finance
1
344 - Labor, social, education & cultural law
1
353 - Specific fields of public administration
1
355 - Military science
1
364 - Criminology
1
more ...