Classification
006 - Special computer methods
3,104
005 - Computer programming, programs & data
605
004 - Data processing & computer science
512
621 - Applied physics
362
040 - [Unassigned]
149
610 - Medicine & health
134
003 - Systems
99
620 - Engineering & allied operations
83
629 - Other branches of engineering
74
600 - Technology
71
700 - The arts; fine & decorative arts
59
000 - Computer science, information & general works
52
900 - History & geography
37
570 - Life sciences; biology
35
025 - Library operations
34
333 - Economics of land & energy
32
910 - Geography & travel
32
519 - Probabilities & applied mathematics
31
140 - Specific philosophical schools
28
500 - Natural sciences & mathematics
24
518 - Numerical analysis
22
630 - Agriculture & related technologies
21
371 - Schools & their activities; special education
19
363 - Other social problems & services
17
515 - Analysis
17
330 - Economics
16
580 - Plants (Botany)
16
001 - Knowledge
14
380 - Commerce, communications & transportation
14
331 - Labor economics
13
516 - Geometry
12
670 - Manufacturing
12
658 - General management
11
530 - Physics
10
616 - Diseases
10
400 - Language
9
520 - Astronomy & allied sciences
9
551 - Geology, hydrology & meteorology
9
612 - Human physiology
9
510 - Mathematics
8
576 - Genetics & evolution
8
660 - Chemical engineering
6
770 - Photography, photographs & computer art
6
800 - Literature & rhetoric
6
014 - Bibliographies of anonymous & pseudonymous works
5
414 - Phonology & phonetics
5
511 - General principles of mathematics
5
534 - Sound & related vibrations
5
720 - Architecture
5
745 - Decorative arts
5
more ...