Classification
658 - General management
20
306 - Culture & institutions
16
305 - Social groups
11
616 - Diseases
9
304 - Factors affecting social behavior
7
370 - Education
6
650 - Management & auxiliary services
6
301 - Sociology & anthropology
4
320 - Political science
4
364 - Criminology
4
610 - Medicine & health
4
158 - Applied psychology
3
418 - Standard usage & applied linguistics
3
620 - Engineering & allied operations
3
910 - Geography & travel
3
005 - Computer programming, programs & data
2
006 - Special computer methods
2
155 - Differential & developmental psychology
2
303 - Social processes
2
330 - Economics
2
333 - Economics of land & energy
2
339 - Macroeconomics & related topics
2
378 - Higher education
2
657 - Accounting
2
794 - Indoor games of skill
2
001 - Knowledge
1
004 - Data processing & computer science
1
150 - Psychology
1
302 - Social interaction
1
324 - The political process
1
337 - International economics
1
338 - Production
1
340 - Law
1
343 - Military, tax, trade & industrial law
1
351 - Public administration
1
361 - Social problems & social welfare in general
1
363 - Other social problems & services
1
371 - Schools & their activities; special education
1
381 - Commerce
1
404 - Special topics
1
407 - Education, research & related topics
1
410 - Linguistics
1
510 - Mathematics
1
520 - Astronomy & allied sciences
1
550 - Earth sciences
1
570 - Life sciences; biology
1
612 - Human physiology
1
615 - Pharmacology & therapeutics
1
617 - Surgery & related medical specialties
1
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
more ...