Classification
600 - Technology
24,719
005 - Computer programming, programs & data
24,200
004 - Data processing & computer science
15,604
006 - Special computer methods
14,641
500 - Natural sciences & mathematics
5,834
331 - Labor economics
5,591
620 - Engineering & allied operations
5,558
658 - General management
5,464
000 - Computer science, information & general works
5,006
621 - Applied physics
4,832
519 - Probabilities & applied mathematics
2,973
745 - Decorative arts
2,717
330 - Economics
2,440
530 - Physics
1,822
384 - Communications; telecommunication
1,593
374 - Adult education
1,403
629 - Other branches of engineering
1,211
003 - Systems
1,085
518 - Numerical analysis
1,057
302 - Social interaction
968
338 - Production
788
515 - Analysis
776
570 - Life sciences; biology
772
700 - The arts; fine & decorative arts
757
610 - Medicine & health
721
510 - Mathematics
626
794 - Indoor games of skill
562
381 - Commerce
547
025 - Library operations
533
670 - Manufacturing
527
541 - Physical chemistry
517
770 - Photography, photographs & computer art
504
333 - Economics of land & energy
492
300 - Social sciences
487
650 - Management & auxiliary services
453
380 - Commerce, communications & transportation
386
900 - History & geography
383
371 - Schools & their activities; special education
358
511 - General principles of mathematics
351
539 - Modern physics
340
531 - Classical mechanics; solid mechanics
327
512 - Algebra
309
363 - Other social problems & services
297
364 - Criminology
279
140 - Specific philosophical schools
275
332 - Financial economics
272
370 - Education
233
303 - Social processes
232
001 - Knowledge
225
720 - Architecture
195
more ...