Classification
515 - Analysis
129
530 - Physics
91
620 - Engineering & allied operations
50
518 - Numerical analysis
35
531 - Classical mechanics; solid mechanics
25
519 - Probabilities & applied mathematics
22
500 - Natural sciences & mathematics
21
510 - Mathematics
17
621 - Applied physics
17
340 - Law
15
003 - Systems
12
539 - Modern physics
12
000 - Computer science, information & general works
11
344 - Labor, social, education & cultural law
11
512 - Algebra
11
004 - Data processing & computer science
9
333 - Economics of land & energy
9
330 - Economics
8
516 - Geometry
8
700 - The arts; fine & decorative arts
8
300 - Social sciences
6
346 - Private law
6
551 - Geology, hydrology & meteorology
6
001 - Knowledge
5
536 - Heat
5
629 - Other branches of engineering
5
658 - General management
5
006 - Special computer methods
4
341 - Law of nations
4
534 - Sound & related vibrations
4
537 - Electricity & electronics
4
514 - Topology
3
523 - Specific celestial bodies & phenomena
3
541 - Physical chemistry
3
576 - Genetics & evolution
3
900 - History & geography
3
005 - Computer programming, programs & data
2
520 - Astronomy & allied sciences
2
535 - Light & infrared & ultraviolet phenomena
2
550 - Earth sciences
2
570 - Life sciences; biology
2
571 - Physiology & related subjects
2
600 - Technology
2
610 - Medicine & health
2
624 - Civil engineering
2
302 - Social interaction
1
304 - Factors affecting social behavior
1
338 - Production
1
343 - Military, tax, trade & industrial law
1
361 - Social problems & social welfare in general
1
more ...