Classification
320 - Political science
2,490
330 - Economics
2,426
780 - Music
1,186
900 - History & geography
1,177
004 - Data processing & computer science
793
300 - Social sciences
707
340 - Law
689
005 - Computer programming, programs & data
675
006 - Special computer methods
473
820 - English & Old English literatures
467
333 - Economics of land & energy
435
658 - General management
427
370 - Education
395
610 - Medicine & health
390
304 - Factors affecting social behavior
382
700 - The arts; fine & decorative arts
346
620 - Engineering & allied operations
291
616 - Diseases
240
621 - Applied physics
237
530 - Physics
234
940 - History of Europe
220
338 - Production
218
363 - Other social problems & services
215
306 - Culture & institutions
206
630 - Agriculture & related technologies
189
943 - Central Europe; Germany
185
800 - Literature & rhetoric
175
600 - Technology
160
380 - Commerce, communications & transportation
145
200 - Religion
143
500 - Natural sciences & mathematics
141
331 - Labor economics
137
305 - Social groups
135
301 - Sociology & anthropology
130
551 - Geology, hydrology & meteorology
123
100 - Philosophy & psychology
122
000 - Computer science, information & general works
114
629 - Other branches of engineering
113
577 - Ecology
106
327 - International relations
105
400 - Language
98
510 - Mathematics
97
332 - Financial economics
94
140 - Specific philosophical schools
88
519 - Probabilities & applied mathematics
84
003 - Systems
82
520 - Astronomy & allied sciences
82
650 - Management & auxiliary services
79
518 - Numerical analysis
73
302 - Social interaction
72
more ...