Classification
004 - Data processing & computer science
4,008
519 - Probabilities & applied mathematics
3,248
005 - Computer programming, programs & data
2,979
330 - Economics
2,311
006 - Special computer methods
2,200
003 - Systems
2,189
320 - Political science
2,142
530 - Physics
2,035
515 - Analysis
1,839
658 - General management
1,824
512 - Algebra
1,738
629 - Other branches of engineering
1,554
300 - Social sciences
1,393
900 - History & geography
1,322
100 - Philosophy & psychology
1,177
500 - Natural sciences & mathematics
1,072
621 - Applied physics
1,069
700 - The arts; fine & decorative arts
932
620 - Engineering & allied operations
908
340 - Law
807
511 - General principles of mathematics
786
333 - Economics of land & energy
585
370 - Education
557
301 - Sociology & anthropology
551
600 - Technology
505
000 - Computer science, information & general works
490
510 - Mathematics
481
306 - Culture & institutions
464
120 - Epistemology, causation & humankind
367
610 - Medicine & health
357
518 - Numerical analysis
356
800 - Literature & rhetoric
342
140 - Specific philosophical schools
324
576 - Genetics & evolution
316
380 - Commerce, communications & transportation
312
338 - Production
288
516 - Geometry
281
331 - Labor economics
262
363 - Other social problems & services
257
539 - Modern physics
243
327 - International relations
242
304 - Factors affecting social behavior
239
305 - Social groups
229
200 - Religion
226
170 - Ethics
223
780 - Music
219
570 - Life sciences; biology
215
400 - Language
199
514 - Topology
193
302 - Social interaction
186
more ...