Classification
600 - Technology
18,444
004 - Data processing & computer science
6,030
005 - Computer programming, programs & data
5,004
331 - Labor economics
4,697
621 - Applied physics
3,595
006 - Special computer methods
3,015
658 - General management
1,525
000 - Computer science, information & general works
1,389
620 - Engineering & allied operations
1,207
500 - Natural sciences & mathematics
1,159
330 - Economics
1,104
700 - The arts; fine & decorative arts
1,018
384 - Communications; telecommunication
855
333 - Economics of land & energy
647
900 - History & geography
604
374 - Adult education
572
302 - Social interaction
531
040 - [Unassigned]
526
610 - Medicine & health
493
380 - Commerce, communications & transportation
470
003 - Systems
430
338 - Production
430
363 - Other social problems & services
354
381 - Commerce
296
140 - Specific philosophical schools
254
629 - Other branches of engineering
248
518 - Numerical analysis
229
745 - Decorative arts
211
580 - Plants (Botany)
193
576 - Genetics & evolution
191
320 - Political science
171
300 - Social sciences
159
530 - Physics
127
519 - Probabilities & applied mathematics
123
670 - Manufacturing
123
370 - Education
120
364 - Criminology
119
720 - Architecture
109
551 - Geology, hydrology & meteorology
108
650 - Management & auxiliary services
102
025 - Library operations
98
340 - Law
98
630 - Agriculture & related technologies
88
540 - Chemistry & allied sciences
86
400 - Language
79
800 - Literature & rhetoric
78
371 - Schools & their activities; special education
73
303 - Social processes
72
321 - Systems of governments & states
72
612 - Human physiology
72
more ...