Classification
515 - Analysis
38
519 - Probabilities & applied mathematics
35
330 - Economics
15
003 - Systems
12
629 - Other branches of engineering
10
004 - Data processing & computer science
9
621 - Applied physics
7
658 - General management
7
001 - Knowledge
6
300 - Social sciences
6
512 - Algebra
6
530 - Physics
6
510 - Mathematics
5
000 - Computer science, information & general works
3
006 - Special computer methods
3
516 - Geometry
3
005 - Computer programming, programs & data
2
333 - Economics of land & energy
2
338 - Production
2
500 - Natural sciences & mathematics
2
518 - Numerical analysis
2
536 - Heat
2
537 - Electricity & electronics
2
570 - Life sciences; biology
2
700 - The arts; fine & decorative arts
2
120 - Epistemology, causation & humankind
1
153 - Mental processes & intelligence
1
301 - Sociology & anthropology
1
325 - International migration & colonization
1
331 - Labor economics
1
332 - Financial economics
1
339 - Macroeconomics & related topics
1
401 - Philosophy & theory
1
511 - General principles of mathematics
1
514 - Topology
1
523 - Specific celestial bodies & phenomena
1
531 - Classical mechanics; solid mechanics
1
539 - Modern physics
1
541 - Physical chemistry
1
550 - Earth sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
600 - Technology
1
620 - Engineering & allied operations
1
624 - Civil engineering
1
650 - Management & auxiliary services
1
670 - Manufacturing
1
745 - Decorative arts
1