Classification
600 - Technology
25,687
005 - Computer programming, programs & data
25,497
004 - Data processing & computer science
15,804
006 - Special computer methods
15,215
500 - Natural sciences & mathematics
6,218
620 - Engineering & allied operations
6,112
331 - Labor economics
5,801
658 - General management
5,523
621 - Applied physics
5,253
000 - Computer science, information & general works
4,963
330 - Economics
4,128
745 - Decorative arts
2,763
519 - Probabilities & applied mathematics
2,422
530 - Physics
2,201
003 - Systems
1,674
384 - Communications; telecommunication
1,615
374 - Adult education
1,374
629 - Other branches of engineering
1,246
518 - Numerical analysis
1,089
302 - Social interaction
969
515 - Analysis
879
570 - Life sciences; biology
875
610 - Medicine & health
850
338 - Production
813
700 - The arts; fine & decorative arts
807
670 - Manufacturing
715
510 - Mathematics
703
381 - Commerce
626
300 - Social sciences
598
025 - Library operations
572
794 - Indoor games of skill
568
333 - Economics of land & energy
513
770 - Photography, photographs & computer art
512
371 - Schools & their activities; special education
474
900 - History & geography
400
511 - General principles of mathematics
372
303 - Social processes
362
380 - Commerce, communications & transportation
358
512 - Algebra
308
650 - Management & auxiliary services
308
363 - Other social problems & services
298
541 - Physical chemistry
296
364 - Criminology
294
332 - Financial economics
292
001 - Knowledge
290
140 - Specific philosophical schools
280
370 - Education
233
531 - Classical mechanics; solid mechanics
218
539 - Modern physics
217
720 - Architecture
202
more ...