Classification
005 - Computer programming, programs & data
6,757
500 - Natural sciences & mathematics
4,560
006 - Special computer methods
3,290
004 - Data processing & computer science
3,047
040 - [Unassigned]
1,956
620 - Engineering & allied operations
1,616
003 - Systems
943
331 - Labor economics
876
658 - General management
778
519 - Probabilities & applied mathematics
726
000 - Computer science, information & general works
691
621 - Applied physics
643
518 - Numerical analysis
602
384 - Communications; telecommunication
432
745 - Decorative arts
292
330 - Economics
272
025 - Library operations
214
511 - General principles of mathematics
214
530 - Physics
175
510 - Mathematics
138
515 - Analysis
135
570 - Life sciences; biology
135
512 - Algebra
131
600 - Technology
125
374 - Adult education
120
300 - Social sciences
115
629 - Other branches of engineering
104
302 - Social interaction
93
338 - Production
85
700 - The arts; fine & decorative arts
85
670 - Manufacturing
79
610 - Medicine & health
63
333 - Economics of land & energy
61
381 - Commerce
61
516 - Geometry
54
551 - Geology, hydrology & meteorology
48
612 - Human physiology
45
001 - Knowledge
44
410 - Linguistics
44
371 - Schools & their activities; special education
43
380 - Commerce, communications & transportation
42
794 - Indoor games of skill
37
332 - Financial economics
35
160 - Logic
33
153 - Mental processes & intelligence
32
363 - Other social problems & services
31
576 - Genetics & evolution
31
650 - Management & auxiliary services
31
520 - Astronomy & allied sciences
29
140 - Specific philosophical schools
28
more ...