Classification
006 - Special computer methods
1,037
004 - Data processing & computer science
341
005 - Computer programming, programs & data
248
621 - Applied physics
147
610 - Medicine & health
41
003 - Systems
32
629 - Other branches of engineering
29
519 - Probabilities & applied mathematics
28
910 - Geography & travel
16
502 - Miscellany
12
570 - Life sciences; biology
12
620 - Engineering & allied operations
11
518 - Numerical analysis
9
616 - Diseases
9
025 - Library operations
8
516 - Geometry
7
374 - Adult education
5
612 - Human physiology
5
515 - Analysis
4
530 - Physics
4
658 - General management
4
333 - Economics of land & energy
3
510 - Mathematics
3
520 - Astronomy & allied sciences
3
650 - Management & auxiliary services
3
100 - Philosophy & psychology
2
617 - Surgery & related medical specialties
2
670 - Manufacturing
2
770 - Photography, photographs & computer art
2
794 - Indoor games of skill
2
000 - Computer science, information & general works
1
001 - Knowledge
1
128 - Humankind
1
150 - Psychology
1
153 - Mental processes & intelligence
1
300 - Social sciences
1
301 - Sociology & anthropology
1
302 - Social interaction
1
330 - Economics
1
331 - Labor economics
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
363 - Other social problems & services
1
371 - Schools & their activities; special education
1
500 - Natural sciences & mathematics
1
501 - Philosophy & theory
1
511 - General principles of mathematics
1
512 - Algebra
1
514 - Topology
1
550 - Earth sciences
1
more ...