Classification
003 - Systems
251
004 - Data processing & computer science
201
629 - Other branches of engineering
198
519 - Probabilities & applied mathematics
176
658 - General management
159
512 - Algebra
130
330 - Economics
126
005 - Computer programming, programs & data
91
530 - Physics
62
515 - Analysis
44
621 - Applied physics
37
340 - Law
35
320 - Political science
25
620 - Engineering & allied operations
19
511 - General principles of mathematics
15
720 - Architecture
15
006 - Special computer methods
14
536 - Heat
14
539 - Modern physics
14
650 - Management & auxiliary services
12
301 - Sociology & anthropology
10
332 - Financial economics
10
610 - Medicine & health
10
300 - Social sciences
9
344 - Labor, social, education & cultural law
9
518 - Numerical analysis
8
531 - Classical mechanics; solid mechanics
8
510 - Mathematics
7
142 - Critical philosophy
6
590 - Animals (Zoology)
6
174 - Occupational ethics
5
624 - Civil engineering
5
670 - Manufacturing
5
342 - Constitutional & administrative law
4
345 - Criminal law
4
516 - Geometry
4
576 - Genetics & evolution
4
120 - Epistemology, causation & humankind
3
336 - Public finance
3
353 - Specific fields of public administration
3
535 - Light & infrared & ultraviolet phenomena
3
537 - Electricity & electronics
3
541 - Physical chemistry
3
616 - Diseases
3
910 - Geography & travel
3
025 - Library operations
2
100 - Philosophy & psychology
2
170 - Ethics
2
302 - Social interaction
2
306 - Culture & institutions
2
more ...