Classification
658 - General management
21,197
330 - Economics
9,352
650 - Management & auxiliary services
8,764
005 - Computer programming, programs & data
5,343
300 - Social sciences
2,902
004 - Data processing & computer science
2,660
333 - Economics of land & energy
2,638
338 - Production
2,537
500 - Natural sciences & mathematics
2,460
670 - Manufacturing
2,327
302 - Social interaction
2,257
331 - Labor economics
2,082
000 - Computer science, information & general works
1,888
620 - Engineering & allied operations
1,721
006 - Special computer methods
1,620
363 - Other social problems & services
1,426
610 - Medicine & health
1,135
621 - Applied physics
976
381 - Commerce
971
320 - Political science
967
332 - Financial economics
945
384 - Communications; telecommunication
835
600 - Technology
831
700 - The arts; fine & decorative arts
807
158 - Applied psychology
781
380 - Commerce, communications & transportation
773
003 - Systems
647
519 - Probabilities & applied mathematics
645
551 - Geology, hydrology & meteorology
569
900 - History & geography
559
577 - Ecology
472
370 - Education
471
304 - Factors affecting social behavior
470
153 - Mental processes & intelligence
422
628 - Sanitary & municipal engineering
384
368 - Insurance
370
340 - Law
360
624 - Civil engineering
358
745 - Decorative arts
344
362 - Social welfare problems & services
341
657 - Accounting
341
630 - Agriculture & related technologies
327
629 - Other branches of engineering
301
025 - Library operations
287
690 - Buildings
284
374 - Adult education
283
140 - Specific philosophical schools
277
371 - Schools & their activities; special education
267
303 - Social processes
263
580 - Plants (Botany)
241
more ...