Classification
005 - Computer programming, programs & data
895
003 - Systems
441
004 - Data processing & computer science
348
006 - Special computer methods
178
621 - Applied physics
85
518 - Numerical analysis
20
025 - Library operations
18
511 - General principles of mathematics
17
530 - Physics
17
512 - Algebra
14
519 - Probabilities & applied mathematics
14
658 - General management
14
330 - Economics
11
303 - Social processes
8
570 - Life sciences; biology
7
610 - Medicine & health
5
620 - Engineering & allied operations
5
910 - Geography & travel
5
040 - [Unassigned]
4
371 - Schools & their activities; special education
4
323 - Civil & political rights
3
381 - Commerce
3
510 - Mathematics
3
551 - Geology, hydrology & meteorology
3
572 - Biochemistry
3
020 - Library & information sciences
2
320 - Political science
2
333 - Economics of land & energy
2
363 - Other social problems & services
2
515 - Analysis
2
612 - Human physiology
2
616 - Diseases
2
670 - Manufacturing
2
160 - Logic
1
300 - Social sciences
1
302 - Social interaction
1
304 - Factors affecting social behavior
1
338 - Production
1
400 - Language
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
516 - Geometry
1
520 - Astronomy & allied sciences
1
534 - Sound & related vibrations
1
550 - Earth sciences
1
601 - Philosophy & theory
1
624 - Civil engineering
1
629 - Other branches of engineering
1
650 - Management & auxiliary services
1
652 - Processes of written communication
1