Classification
620 - Engineering & allied operations
73
005 - Computer programming, programs & data
69
004 - Data processing & computer science
59
510 - Mathematics
41
006 - Special computer methods
38
512 - Algebra
38
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
330 - Economics
15
511 - General principles of mathematics
15
300 - Social sciences
14
629 - Other branches of engineering
14
500 - Natural sciences & mathematics
13
001 - Knowledge
11
515 - Analysis
8
600 - Technology
8
670 - Manufacturing
5
331 - Labor economics
4
340 - Law
4
531 - Classical mechanics; solid mechanics
4
617 - Surgery & related medical specialties
4
333 - Economics of land & energy
3
570 - Life sciences; biology
3
615 - Pharmacology & therapeutics
3
000 - Computer science, information & general works
2
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
025 - Library operations
1
120 - Epistemology, causation & humankind
1
301 - Sociology & anthropology
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
more ...