Classification
519 - Probabilities & applied mathematics
928
300 - Social sciences
70
570 - Life sciences; biology
39
330 - Economics
38
003 - Systems
17
515 - Analysis
15
530 - Physics
15
621 - Applied physics
11
005 - Computer programming, programs & data
10
006 - Special computer methods
10
510 - Mathematics
8
301 - Sociology & anthropology
7
512 - Algebra
6
518 - Numerical analysis
6
658 - General management
6
004 - Data processing & computer science
5
368 - Insurance
5
516 - Geometry
5
550 - Earth sciences
5
614 - Incidence & prevention of disease
5
620 - Engineering & allied operations
5
001 - Knowledge
4
020 - Library & information sciences
4
150 - Psychology
4
304 - Factors affecting social behavior
4
511 - General principles of mathematics
4
520 - Astronomy & allied sciences
4
501 - Philosophy & theory
3
551 - Geology, hydrology & meteorology
3
624 - Civil engineering
3
629 - Other branches of engineering
3
910 - Geography & travel
3
120 - Epistemology, causation & humankind
2
333 - Economics of land & energy
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
100 - Philosophy & psychology
1
160 - Logic
1
170 - Ethics
1
324 - The political process
1
332 - Financial economics
1
338 - Production
1
363 - Other social problems & services
1
370 - Education
1
514 - Topology
1
541 - Physical chemistry
1
560 - Paleontology; paleozoology
1
613 - Personal health & safety
1
616 - Diseases
1
630 - Agriculture & related technologies
1
more ...