Classification
330 - Economics
2,567
320 - Political science
2,522
900 - History & geography
1,201
780 - Music
1,186
300 - Social sciences
750
340 - Law
698
005 - Computer programming, programs & data
665
004 - Data processing & computer science
644
006 - Special computer methods
524
820 - English & Old English literatures
467
333 - Economics of land & energy
445
658 - General management
418
370 - Education
404
304 - Factors affecting social behavior
398
610 - Medicine & health
392
700 - The arts; fine & decorative arts
372
620 - Engineering & allied operations
287
621 - Applied physics
236
616 - Diseases
234
530 - Physics
231
940 - History of Europe
224
363 - Other social problems & services
215
306 - Culture & institutions
208
338 - Production
206
630 - Agriculture & related technologies
192
943 - Central Europe; Germany
188
800 - Literature & rhetoric
179
200 - Religion
176
600 - Technology
165
380 - Commerce, communications & transportation
151
331 - Labor economics
143
500 - Natural sciences & mathematics
142
301 - Sociology & anthropology
139
305 - Social groups
138
100 - Philosophy & psychology
132
003 - Systems
131
040 - [Unassigned]
129
551 - Geology, hydrology & meteorology
126
000 - Computer science, information & general works
120
629 - Other branches of engineering
114
327 - International relations
109
400 - Language
103
577 - Ecology
103
510 - Mathematics
98
332 - Financial economics
95
519 - Probabilities & applied mathematics
85
520 - Astronomy & allied sciences
82
140 - Specific philosophical schools
81
650 - Management & auxiliary services
75
346 - Private law
73
more ...