Classification
005 - Computer programming, programs & data
2,027
004 - Data processing & computer science
1,398
006 - Special computer methods
663
621 - Applied physics
317
003 - Systems
246
658 - General management
192
620 - Engineering & allied operations
160
519 - Probabilities & applied mathematics
133
629 - Other branches of engineering
83
670 - Manufacturing
71
650 - Management & auxiliary services
63
518 - Numerical analysis
62
515 - Analysis
48
330 - Economics
45
510 - Mathematics
39
610 - Medicine & health
39
300 - Social sciences
38
511 - General principles of mathematics
36
001 - Knowledge
30
025 - Library operations
30
530 - Physics
28
371 - Schools & their activities; special education
26
616 - Diseases
26
512 - Algebra
25
520 - Astronomy & allied sciences
24
541 - Physical chemistry
19
338 - Production
16
910 - Geography & travel
16
660 - Chemical engineering
15
303 - Social processes
14
370 - Education
14
381 - Commerce
14
531 - Classical mechanics; solid mechanics
14
571 - Physiology & related subjects
14
551 - Geology, hydrology & meteorology
13
572 - Biochemistry
13
624 - Civil engineering
13
550 - Earth sciences
12
500 - Natural sciences & mathematics
11
516 - Geometry
11
570 - Life sciences; biology
11
020 - Library & information sciences
10
050 - General serial publications
10
333 - Economics of land & energy
8
534 - Sound & related vibrations
8
340 - Law
7
502 - Miscellany
7
332 - Financial economics
6
363 - Other social problems & services
6
540 - Chemistry & allied sciences
6
more ...