Classification
005 - Computer programming, programs & data
6,163
004 - Data processing & computer science
2,629
006 - Special computer methods
1,533
600 - Technology
825
620 - Engineering & allied operations
697
040 - [Unassigned]
695
658 - General management
431
621 - Applied physics
423
500 - Natural sciences & mathematics
251
003 - Systems
164
331 - Labor economics
158
000 - Computer science, information & general works
129
518 - Numerical analysis
107
629 - Other branches of engineering
100
330 - Economics
85
670 - Manufacturing
72
745 - Decorative arts
71
650 - Management & auxiliary services
61
794 - Indoor games of skill
55
371 - Schools & their activities; special education
51
384 - Communications; telecommunication
48
519 - Probabilities & applied mathematics
47
338 - Production
44
025 - Library operations
33
300 - Social sciences
30
374 - Adult education
28
302 - Social interaction
27
610 - Medicine & health
22
001 - Knowledge
21
333 - Economics of land & energy
19
511 - General principles of mathematics
19
700 - The arts; fine & decorative arts
19
510 - Mathematics
17
380 - Commerce, communications & transportation
15
570 - Life sciences; biology
14
381 - Commerce
13
512 - Algebra
13
153 - Mental processes & intelligence
12
303 - Social processes
12
530 - Physics
12
400 - Language
11
720 - Architecture
10
046 - [Unassigned]
9
515 - Analysis
9
550 - Earth sciences
9
140 - Specific philosophical schools
8
033 - Encyclopedias in other Germanic languages
7
323 - Civil & political rights
7
808 - Rhetoric & collections of literature
7
910 - Geography & travel
7
more ...