Classification
005 - Computer programming, programs & data
1,164
003 - Systems
513
004 - Data processing & computer science
488
500 - Natural sciences & mathematics
212
006 - Special computer methods
208
621 - Applied physics
88
658 - General management
73
000 - Computer science, information & general works
53
620 - Engineering & allied operations
40
519 - Probabilities & applied mathematics
31
745 - Decorative arts
29
025 - Library operations
27
530 - Physics
23
518 - Numerical analysis
21
511 - General principles of mathematics
18
512 - Algebra
18
330 - Economics
15
384 - Communications; telecommunication
14
510 - Mathematics
13
700 - The arts; fine & decorative arts
12
333 - Economics of land & energy
11
303 - Social processes
10
331 - Labor economics
9
600 - Technology
8
610 - Medicine & health
8
570 - Life sciences; biology
7
650 - Management & auxiliary services
7
363 - Other social problems & services
6
380 - Commerce, communications & transportation
6
910 - Geography & travel
5
320 - Political science
4
371 - Schools & their activities; special education
4
001 - Knowledge
3
323 - Civil & political rights
3
381 - Commerce
3
540 - Chemistry & allied sciences
3
551 - Geology, hydrology & meteorology
3
572 - Biochemistry
3
020 - Library & information sciences
2
300 - Social sciences
2
332 - Financial economics
2
400 - Language
2
515 - Analysis
2
516 - Geometry
2
612 - Human physiology
2
616 - Diseases
2
670 - Manufacturing
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
153 - Mental processes & intelligence
1
more ...