Classification
620 - Engineering & allied operations
70
005 - Computer programming, programs & data
66
004 - Data processing & computer science
57
510 - Mathematics
40
512 - Algebra
38
006 - Special computer methods
33
519 - Probabilities & applied mathematics
32
518 - Numerical analysis
31
650 - Management & auxiliary services
23
658 - General management
21
616 - Diseases
20
621 - Applied physics
17
003 - Systems
16
629 - Other branches of engineering
14
330 - Economics
13
300 - Social sciences
12
511 - General principles of mathematics
12
001 - Knowledge
11
500 - Natural sciences & mathematics
8
515 - Analysis
7
670 - Manufacturing
5
331 - Labor economics
4
531 - Classical mechanics; solid mechanics
4
617 - Surgery & related medical specialties
4
333 - Economics of land & energy
3
340 - Law
3
570 - Life sciences; biology
3
615 - Pharmacology & therapeutics
3
306 - Culture & institutions
2
332 - Financial economics
2
338 - Production
2
343 - Military, tax, trade & industrial law
2
384 - Communications; telecommunication
2
516 - Geometry
2
530 - Physics
2
541 - Physical chemistry
2
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
000 - Computer science, information & general works
1
120 - Epistemology, causation & humankind
1
302 - Social interaction
1
303 - Social processes
1
305 - Social groups
1
336 - Public finance
1
337 - International economics
1
342 - Constitutional & administrative law
1
344 - Labor, social, education & cultural law
1
353 - Specific fields of public administration
1
363 - Other social problems & services
1
368 - Insurance
1
370 - Education
1
more ...