Classification
620 - Engineering & allied operations
12,955
621 - Applied physics
7,821
005 - Computer programming, programs & data
7,094
006 - Special computer methods
5,415
004 - Data processing & computer science
3,254
600 - Technology
2,780
629 - Other branches of engineering
2,757
500 - Natural sciences & mathematics
2,507
900 - History & geography
1,738
658 - General management
1,718
333 - Economics of land & energy
1,491
610 - Medicine & health
1,482
003 - Systems
1,478
700 - The arts; fine & decorative arts
1,284
330 - Economics
1,153
624 - Civil engineering
1,065
670 - Manufacturing
1,064
000 - Computer science, information & general works
1,060
363 - Other social problems & services
1,041
384 - Communications; telecommunication
1,016
519 - Probabilities & applied mathematics
1,005
331 - Labor economics
881
040 - [Unassigned]
818
530 - Physics
772
660 - Chemical engineering
729
745 - Decorative arts
687
551 - Geology, hydrology & meteorology
581
380 - Commerce, communications & transportation
492
630 - Agriculture & related technologies
443
515 - Analysis
407
628 - Sanitary & municipal engineering
389
580 - Plants (Botany)
363
531 - Classical mechanics; solid mechanics
361
518 - Numerical analysis
358
320 - Political science
341
690 - Buildings
329
571 - Physiology & related subjects
320
338 - Production
293
540 - Chemistry & allied sciences
290
140 - Specific philosophical schools
244
374 - Adult education
239
550 - Earth sciences
225
576 - Genetics & evolution
222
510 - Mathematics
220
300 - Social sciences
200
720 - Architecture
199
302 - Social interaction
196
616 - Diseases
188
541 - Physical chemistry
184
520 - Astronomy & allied sciences
181
more ...