Classification
320 - Political science
2,521
330 - Economics
2,430
900 - History & geography
1,203
780 - Music
1,186
004 - Data processing & computer science
794
300 - Social sciences
747
340 - Law
699
005 - Computer programming, programs & data
677
006 - Special computer methods
477
820 - English & Old English literatures
467
333 - Economics of land & energy
452
658 - General management
429
370 - Education
403
610 - Medicine & health
395
304 - Factors affecting social behavior
394
700 - The arts; fine & decorative arts
372
620 - Engineering & allied operations
293
616 - Diseases
238
621 - Applied physics
238
530 - Physics
233
940 - History of Europe
222
363 - Other social problems & services
219
338 - Production
217
306 - Culture & institutions
210
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
500 - Natural sciences & mathematics
143
331 - Labor economics
142
305 - Social groups
140
301 - Sociology & anthropology
135
100 - Philosophy & psychology
132
551 - Geology, hydrology & meteorology
127
000 - Computer science, information & general works
120
629 - Other branches of engineering
115
327 - International relations
105
577 - Ecology
105
400 - Language
103
510 - Mathematics
98
332 - Financial economics
95
519 - Probabilities & applied mathematics
86
003 - Systems
83
520 - Astronomy & allied sciences
82
140 - Specific philosophical schools
81
650 - Management & auxiliary services
79
302 - Social interaction
73
518 - Numerical analysis
73
more ...