Classification
300 - Social sciences
4,973
001 - Knowledge
4,348
140 - Specific philosophical schools
2,853
658 - General management
2,215
004 - Data processing & computer science
1,785
005 - Computer programming, programs & data
1,757
304 - Factors affecting social behavior
1,617
330 - Economics
1,397
006 - Special computer methods
1,190
610 - Medicine & health
1,171
612 - Human physiology
1,017
700 - The arts; fine & decorative arts
743
900 - History & geography
682
320 - Political science
640
333 - Economics of land & energy
639
620 - Engineering & allied operations
510
000 - Computer science, information & general works
503
616 - Diseases
497
363 - Other social problems & services
468
600 - Technology
422
340 - Law
400
570 - Life sciences; biology
364
341 - Law of nations
360
306 - Culture & institutions
326
301 - Sociology & anthropology
313
100 - Philosophy & psychology
298
331 - Labor economics
297
621 - Applied physics
289
370 - Education
278
650 - Management & auxiliary services
266
500 - Natural sciences & mathematics
265
611 - Human anatomy, cytology & histology
265
380 - Commerce, communications & transportation
260
158 - Applied psychology
243
910 - Geography & travel
238
170 - Ethics
226
571 - Physiology & related subjects
226
551 - Geology, hydrology & meteorology
212
519 - Probabilities & applied mathematics
207
305 - Social groups
200
599 - Mammals
200
800 - Literature & rhetoric
188
615 - Pharmacology & therapeutics
186
200 - Religion
182
003 - Systems
181
302 - Social interaction
168
745 - Decorative arts
166
580 - Plants (Botany)
165
576 - Genetics & evolution
161
371 - Schools & their activities; special education
160
more ...