Classification
362 - Social welfare problems & services
299
658 - General management
95
610 - Medicine & health
91
003 - Systems
54
300 - Social sciences
22
338 - Production
20
613 - Personal health & safety
16
330 - Economics
15
614 - Incidence & prevention of disease
15
306 - Culture & institutions
11
353 - Specific fields of public administration
11
621 - Applied physics
10
302 - Social interaction
9
616 - Diseases
9
617 - Surgery & related medical specialties
9
500 - Natural sciences & mathematics
8
006 - Special computer methods
7
657 - Accounting
7
343 - Military, tax, trade & industrial law
6
057 - Serials in Slavic languages
5
005 - Computer programming, programs & data
4
301 - Sociology & anthropology
4
381 - Commerce
4
519 - Probabilities & applied mathematics
4
615 - Pharmacology & therapeutics
4
620 - Engineering & allied operations
4
001 - Knowledge
3
331 - Labor economics
3
700 - The arts; fine & decorative arts
3
061 - Organizations in North America
2
158 - Applied psychology
2
174 - Occupational ethics
2
340 - Law
2
352 - General considerations of public administration
2
361 - Social problems & social welfare in general
2
374 - Adult education
2
384 - Communications; telecommunication
2
571 - Physiology & related subjects
2
650 - Management & auxiliary services
2
651 - Office services
2
670 - Manufacturing
2
000 - Computer science, information & general works
1
004 - Data processing & computer science
1
140 - Specific philosophical schools
1
150 - Psychology
1
155 - Differential & developmental psychology
1
170 - Ethics
1
344 - Labor, social, education & cultural law
1
346 - Private law
1
355 - Military science
1
more ...