Classification
660 - Chemical engineering
301
338 - Production
159
658 - General management
153
003 - Systems
112
620 - Engineering & allied operations
105
670 - Manufacturing
102
541 - Physical chemistry
70
621 - Applied physics
68
519 - Probabilities & applied mathematics
62
629 - Other branches of engineering
40
004 - Data processing & computer science
33
515 - Analysis
32
006 - Special computer methods
30
330 - Economics
28
363 - Other social problems & services
28
005 - Computer programming, programs & data
25
320 - Political science
25
547 - Organic chemistry
25
624 - Civil engineering
24
531 - Classical mechanics; solid mechanics
23
530 - Physics
22
616 - Diseases
21
158 - Applied psychology
17
333 - Economics of land & energy
16
536 - Heat
15
543 - Analytical chemistry
15
518 - Numerical analysis
14
650 - Management & auxiliary services
13
332 - Financial economics
12
572 - Biochemistry
11
641 - Food & drink
11
664 - Food technology
11
327 - International relations
9
690 - Buildings
9
546 - Inorganic chemistry
8
551 - Geology, hydrology & meteorology
8
337 - International economics
7
512 - Algebra
7
610 - Medicine & health
7
577 - Ecology
6
579 - Microorganisms, fungi & algae
6
628 - Sanitary & municipal engineering
6
613 - Personal health & safety
5
614 - Incidence & prevention of disease
5
511 - General principles of mathematics
4
539 - Modern physics
4
155 - Differential & developmental psychology
3
304 - Factors affecting social behavior
3
306 - Culture & institutions
3
534 - Sound & related vibrations
3
more ...