Classification
006 - Special computer methods
3,949
005 - Computer programming, programs & data
2,082
004 - Data processing & computer science
1,059
745 - Decorative arts
775
620 - Engineering & allied operations
615
000 - Computer science, information & general works
499
500 - Natural sciences & mathematics
486
519 - Probabilities & applied mathematics
448
621 - Applied physics
443
658 - General management
386
330 - Economics
382
331 - Labor economics
323
770 - Photography, photographs & computer art
299
040 - [Unassigned]
277
600 - Technology
225
302 - Social interaction
222
510 - Mathematics
217
384 - Communications; telecommunication
214
003 - Systems
201
740 - Drawing & decorative arts
201
741 - Drawing & drawings
197
794 - Indoor games of skill
194
610 - Medicine & health
148
300 - Social sciences
144
518 - Numerical analysis
144
700 - The arts; fine & decorative arts
138
001 - Knowledge
124
670 - Manufacturing
89
530 - Physics
86
686 - Printing & related activities
86
900 - History & geography
85
616 - Diseases
84
511 - General principles of mathematics
82
629 - Other branches of engineering
79
777 - [Unassigned]
69
516 - Geometry
67
515 - Analysis
65
333 - Economics of land & energy
63
374 - Adult education
62
381 - Commerce
60
570 - Life sciences; biology
58
380 - Commerce, communications & transportation
56
791 - Public performances
56
910 - Geography & travel
53
370 - Education
47
551 - Geology, hydrology & meteorology
45
650 - Management & auxiliary services
42
371 - Schools & their activities; special education
40
617 - Surgery & related medical specialties
39
778 - Fields & kinds of photography
38
more ...