Classification
658 - General management
21,067
330 - Economics
9,215
650 - Management & auxiliary services
8,754
005 - Computer programming, programs & data
5,307
300 - Social sciences
2,807
004 - Data processing & computer science
2,662
333 - Economics of land & energy
2,566
338 - Production
2,534
500 - Natural sciences & mathematics
2,444
670 - Manufacturing
2,312
302 - Social interaction
2,247
331 - Labor economics
2,063
000 - Computer science, information & general works
1,871
620 - Engineering & allied operations
1,694
006 - Special computer methods
1,546
363 - Other social problems & services
1,399
610 - Medicine & health
1,109
381 - Commerce
972
621 - Applied physics
967
332 - Financial economics
946
320 - Political science
912
384 - Communications; telecommunication
823
600 - Technology
792
158 - Applied psychology
773
700 - The arts; fine & decorative arts
762
380 - Commerce, communications & transportation
740
519 - Probabilities & applied mathematics
644
003 - Systems
624
551 - Geology, hydrology & meteorology
568
900 - History & geography
530
577 - Ecology
486
370 - Education
476
304 - Factors affecting social behavior
446
153 - Mental processes & intelligence
411
628 - Sanitary & municipal engineering
383
624 - Civil engineering
368
368 - Insurance
367
340 - Law
353
362 - Social welfare problems & services
346
745 - Decorative arts
342
657 - Accounting
325
629 - Other branches of engineering
301
630 - Agriculture & related technologies
301
025 - Library operations
287
374 - Adult education
284
690 - Buildings
278
140 - Specific philosophical schools
276
371 - Schools & their activities; special education
267
303 - Social processes
255
580 - Plants (Botany)
235
more ...