Classification
330 - Economics
8,415
519 - Probabilities & applied mathematics
3,585
006 - Special computer methods
1,803
005 - Computer programming, programs & data
1,366
610 - Medicine & health
1,236
320 - Political science
1,184
530 - Physics
1,149
658 - General management
1,028
300 - Social sciences
944
620 - Engineering & allied operations
923
621 - Applied physics
852
004 - Data processing & computer science
793
510 - Mathematics
678
500 - Natural sciences & mathematics
675
570 - Life sciences; biology
565
333 - Economics of land & energy
545
000 - Computer science, information & general works
491
600 - Technology
487
616 - Diseases
423
515 - Analysis
402
700 - The arts; fine & decorative arts
365
003 - Systems
337
551 - Geology, hydrology & meteorology
334
900 - History & geography
334
363 - Other social problems & services
331
304 - Factors affecting social behavior
305
332 - Financial economics
295
370 - Education
272
338 - Production
266
001 - Knowledge
248
340 - Law
217
331 - Labor economics
211
380 - Commerce, communications & transportation
202
539 - Modern physics
178
670 - Manufacturing
172
629 - Other branches of engineering
170
520 - Astronomy & allied sciences
165
571 - Physiology & related subjects
163
301 - Sociology & anthropology
151
512 - Algebra
147
511 - General principles of mathematics
146
541 - Physical chemistry
144
577 - Ecology
142
550 - Earth sciences
141
630 - Agriculture & related technologies
139
518 - Numerical analysis
133
150 - Psychology
131
572 - Biochemistry
124
140 - Specific philosophical schools
121
302 - Social interaction
119
more ...