Classification
519 - Probabilities & applied mathematics
930
300 - Social sciences
75
570 - Life sciences; biology
48
330 - Economics
33
003 - Systems
18
515 - Analysis
15
530 - Physics
15
005 - Computer programming, programs & data
11
621 - Applied physics
11
006 - Special computer methods
10
301 - Sociology & anthropology
10
510 - Mathematics
9
368 - Insurance
6
512 - Algebra
6
518 - Numerical analysis
6
658 - General management
6
001 - Knowledge
5
304 - Factors affecting social behavior
5
516 - Geometry
5
550 - Earth sciences
5
614 - Incidence & prevention of disease
5
620 - Engineering & allied operations
5
004 - Data processing & computer science
4
020 - Library & information sciences
4
150 - Psychology
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
378 - Higher education
1
514 - Topology
1
541 - Physical chemistry
1
560 - Paleontology; paleozoology
1
613 - Personal health & safety
1
616 - Diseases
1
more ...