Classification
610 - Medicine & health
161
362 - Social welfare problems & services
38
616 - Diseases
35
617 - Surgery & related medical specialties
30
158 - Applied psychology
29
613 - Personal health & safety
18
344 - Labor, social, education & cultural law
14
614 - Incidence & prevention of disease
14
353 - Specific fields of public administration
13
658 - General management
10
003 - Systems
7
006 - Special computer methods
6
061 - Organizations in North America
6
657 - Accounting
6
618 - Gynecology, obstetrics, pediatrics & geriatrics
5
615 - Pharmacology & therapeutics
4
155 - Differential & developmental psychology
3
363 - Other social problems & services
3
612 - Human physiology
2
000 - Computer science, information & general works
1
005 - Computer programming, programs & data
1
140 - Specific philosophical schools
1
153 - Mental processes & intelligence
1
306 - Culture & institutions
1
333 - Economics of land & energy
1
338 - Production
1
352 - General considerations of public administration
1
370 - Education
1
380 - Commerce, communications & transportation
1
418 - Standard usage & applied linguistics
1
519 - Probabilities & applied mathematics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
620 - Engineering & allied operations
1
621 - Applied physics
1
697 - Heating, ventilating & air-conditioning
1
700 - The arts; fine & decorative arts
1
820 - English & Old English literatures
1