Classification
005 - Computer programming, programs & data
2,145
004 - Data processing & computer science
498
500 - Natural sciences & mathematics
326
331 - Labor economics
319
620 - Engineering & allied operations
242
006 - Special computer methods
219
000 - Computer science, information & general works
184
374 - Adult education
128
658 - General management
103
040 - [Unassigned]
73
384 - Communications; telecommunication
67
621 - Applied physics
55
745 - Decorative arts
29
003 - Systems
23
330 - Economics
23
600 - Technology
21
518 - Numerical analysis
13
510 - Mathematics
11
629 - Other branches of engineering
10
363 - Other social problems & services
9
670 - Manufacturing
9
338 - Production
8
364 - Criminology
8
323 - Civil & political rights
7
700 - The arts; fine & decorative arts
7
140 - Specific philosophical schools
6
380 - Commerce, communications & transportation
6
519 - Probabilities & applied mathematics
6
794 - Indoor games of skill
6
900 - History & geography
6
300 - Social sciences
5
302 - Social interaction
5
333 - Economics of land & energy
5
025 - Library operations
4
320 - Political science
4
332 - Financial economics
4
340 - Law
3
511 - General principles of mathematics
3
550 - Earth sciences
3
576 - Genetics & evolution
3
720 - Architecture
3
512 - Algebra
2
526 - Mathematical geography
2
530 - Physics
2
571 - Physiology & related subjects
2
610 - Medicine & health
2
650 - Management & auxiliary services
2
046 - [Unassigned]
1
070 - News media, journalism & publishing
1
150 - Psychology
1
more ...