Classification
006 - Special computer methods
2,670
004 - Data processing & computer science
487
005 - Computer programming, programs & data
429
621 - Applied physics
243
040 - [Unassigned]
152
610 - Medicine & health
104
003 - Systems
75
570 - Life sciences; biology
67
620 - Engineering & allied operations
51
700 - The arts; fine & decorative arts
47
600 - Technology
44
629 - Other branches of engineering
42
519 - Probabilities & applied mathematics
40
025 - Library operations
36
518 - Numerical analysis
30
000 - Computer science, information & general works
27
900 - History & geography
27
333 - Economics of land & energy
26
910 - Geography & travel
20
500 - Natural sciences & mathematics
17
140 - Specific philosophical schools
15
530 - Physics
13
363 - Other social problems & services
12
371 - Schools & their activities; special education
12
516 - Geometry
12
616 - Diseases
11
330 - Economics
10
001 - Knowledge
9
380 - Commerce, communications & transportation
8
580 - Plants (Botany)
8
612 - Human physiology
8
670 - Manufacturing
8
510 - Mathematics
7
658 - General management
6
100 - Philosophy & psychology
5
320 - Political science
5
331 - Labor economics
5
414 - Phonology & phonetics
5
515 - Analysis
5
770 - Photography, photographs & computer art
5
014 - Bibliographies of anonymous & pseudonymous works
4
340 - Law
4
353 - Specific fields of public administration
4
370 - Education
4
511 - General principles of mathematics
4
550 - Earth sciences
4
576 - Genetics & evolution
4
020 - Library & information sciences
3
300 - Social sciences
3
400 - Language
3
more ...