Classification
600 - Technology
25,680
005 - Computer programming, programs & data
24,832
006 - Special computer methods
15,893
004 - Data processing & computer science
13,370
500 - Natural sciences & mathematics
5,997
620 - Engineering & allied operations
5,785
331 - Labor economics
5,680
658 - General management
5,386
000 - Computer science, information & general works
4,942
621 - Applied physics
4,433
330 - Economics
4,015
745 - Decorative arts
2,746
519 - Probabilities & applied mathematics
2,399
530 - Physics
2,188
040 - [Unassigned]
1,980
003 - Systems
1,884
384 - Communications; telecommunication
1,596
374 - Adult education
1,339
518 - Numerical analysis
1,085
629 - Other branches of engineering
1,072
302 - Social interaction
970
515 - Analysis
866
610 - Medicine & health
849
570 - Life sciences; biology
831
700 - The arts; fine & decorative arts
793
338 - Production
781
670 - Manufacturing
705
510 - Mathematics
684
381 - Commerce
622
025 - Library operations
569
794 - Indoor games of skill
562
300 - Social sciences
549
770 - Photography, photographs & computer art
509
333 - Economics of land & energy
507
371 - Schools & their activities; special education
461
900 - History & geography
398
511 - General principles of mathematics
370
380 - Commerce, communications & transportation
359
512 - Algebra
306
650 - Management & auxiliary services
303
541 - Physical chemistry
297
363 - Other social problems & services
294
364 - Criminology
289
332 - Financial economics
286
140 - Specific philosophical schools
280
001 - Knowledge
275
370 - Education
233
531 - Classical mechanics; solid mechanics
221
539 - Modern physics
216
720 - Architecture
202
more ...