Classification
530 - Physics
6
539 - Modern physics
6
620 - Engineering & allied operations
5
515 - Analysis
4
005 - Computer programming, programs & data
3
006 - Special computer methods
3
616 - Diseases
3
516 - Geometry
2
518 - Numerical analysis
2
571 - Physiology & related subjects
2
621 - Applied physics
2
658 - General management
2
170 - Ethics
1
330 - Economics
1
331 - Labor economics
1
333 - Economics of land & energy
1
368 - Insurance
1
381 - Commerce
1
500 - Natural sciences & mathematics
1
514 - Topology
1
541 - Physical chemistry
1
546 - Inorganic chemistry
1
551 - Geology, hydrology & meteorology
1
572 - Biochemistry
1
573 - Specific physiological systems in animals
1
577 - Ecology
1
581 - Specific topics in natural history
1
613 - Personal health & safety
1
614 - Incidence & prevention of disease
1
624 - Civil engineering
1
629 - Other branches of engineering
1
630 - Agriculture & related technologies
1