Classification
600 - Technology
17,822
004 - Data processing & computer science
4,990
621 - Applied physics
3,839
005 - Computer programming, programs & data
3,375
384 - Communications; telecommunication
2,531
330 - Economics
2,294
380 - Commerce, communications & transportation
2,084
302 - Social interaction
1,915
006 - Special computer methods
1,791
658 - General management
1,675
620 - Engineering & allied operations
778
320 - Political science
766
331 - Labor economics
619
500 - Natural sciences & mathematics
589
300 - Social sciences
506
000 - Computer science, information & general works
465
610 - Medicine & health
404
700 - The arts; fine & decorative arts
330
003 - Systems
290
306 - Culture & institutions
285
629 - Other branches of engineering
271
900 - History & geography
271
338 - Production
266
303 - Social processes
222
333 - Economics of land & energy
218
370 - Education
211
518 - Numerical analysis
201
301 - Sociology & anthropology
195
070 - News media, journalism & publishing
186
381 - Commerce
182
650 - Management & auxiliary services
174
670 - Manufacturing
170
570 - Life sciences; biology
147
745 - Decorative arts
147
400 - Language
142
363 - Other social problems & services
135
140 - Specific philosophical schools
133
808 - Rhetoric & collections of literature
130
410 - Linguistics
128
153 - Mental processes & intelligence
114
100 - Philosophy & psychology
102
158 - Applied psychology
101
791 - Public performances
94
418 - Standard usage & applied linguistics
85
659 - Advertising & public relations
85
530 - Physics
83
025 - Library operations
79
340 - Law
74
327 - International relations
72
150 - Psychology
71
more ...