Classification
330 - Economics
143,513
820 - English & Old English literatures
80,869
320 - Political science
79,996
600 - Technology
61,748
340 - Law
60,145
658 - General management
33,575
610 - Medicine & health
31,240
005 - Computer programming, programs & data
27,370
500 - Natural sciences & mathematics
27,046
620 - Engineering & allied operations
24,479
900 - History & geography
23,317
300 - Social sciences
22,965
621 - Applied physics
21,244
616 - Diseases
20,601
004 - Data processing & computer science
17,895
006 - Special computer methods
17,586
780 - Music
15,047
000 - Computer science, information & general works
14,555
333 - Economics of land & energy
13,250
650 - Management & auxiliary services
11,911
370 - Education
11,698
700 - The arts; fine & decorative arts
11,220
331 - Labor economics
9,358
800 - Literature & rhetoric
8,954
338 - Production
8,929
363 - Other social problems & services
8,649
530 - Physics
8,585
510 - Mathematics
7,393
380 - Commerce, communications & transportation
7,304
519 - Probabilities & applied mathematics
7,166
302 - Social interaction
6,467
230 - Christianity & Christian theology
6,182
570 - Life sciences; biology
6,071
630 - Agriculture & related technologies
6,042
100 - Philosophy & psychology
6,034
617 - Surgery & related medical specialties
5,929
304 - Factors affecting social behavior
5,797
301 - Sociology & anthropology
5,512
515 - Analysis
5,324
332 - Financial economics
5,012
540 - Chemistry & allied sciences
4,967
306 - Culture & institutions
4,860
200 - Religion
4,843
629 - Other branches of engineering
4,834
280 - Christian denominations & sects
4,611
346 - Private law
4,557
520 - Astronomy & allied sciences
4,503
250 - Christian orders & local church
4,459
745 - Decorative arts
4,370
170 - Ethics
4,345
more ...