Classification
515 - Analysis
333
620 - Engineering & allied operations
236
621 - Applied physics
235
005 - Computer programming, programs & data
219
519 - Probabilities & applied mathematics
211
006 - Special computer methods
201
616 - Diseases
184
004 - Data processing & computer science
164
330 - Economics
149
530 - Physics
105
658 - General management
93
571 - Physiology & related subjects
90
610 - Medicine & health
78
003 - Systems
67
572 - Biochemistry
65
577 - Ecology
64
512 - Algebra
63
510 - Mathematics
60
500 - Natural sciences & mathematics
59
518 - Numerical analysis
57
612 - Human physiology
54
629 - Other branches of engineering
49
511 - General principles of mathematics
44
670 - Manufacturing
43
300 - Social sciences
41
570 - Life sciences; biology
41
617 - Surgery & related medical specialties
38
531 - Classical mechanics; solid mechanics
36
333 - Economics of land & energy
32
001 - Knowledge
29
338 - Production
29
541 - Physical chemistry
25
331 - Labor economics
23
332 - Financial economics
23
551 - Geology, hydrology & meteorology
23
580 - Plants (Botany)
23
660 - Chemical engineering
23
630 - Agriculture & related technologies
22
539 - Modern physics
21
615 - Pharmacology & therapeutics
21
516 - Geometry
20
514 - Topology
18
363 - Other social problems & services
17
550 - Earth sciences
16
618 - Gynecology, obstetrics, pediatrics & geriatrics
16
624 - Civil engineering
16
664 - Food technology
16
384 - Communications; telecommunication
15
304 - Factors affecting social behavior
14
520 - Astronomy & allied sciences
14
more ...