Classification
670 - Manufacturing
994
620 - Engineering & allied operations
315
658 - General management
263
621 - Applied physics
207
629 - Other branches of engineering
170
003 - Systems
75
660 - Chemical engineering
72
006 - Special computer methods
71
330 - Economics
53
519 - Probabilities & applied mathematics
32
004 - Data processing & computer science
27
338 - Production
25
304 - Factors affecting social behavior
20
333 - Economics of land & energy
20
650 - Management & auxiliary services
20
005 - Computer programming, programs & data
19
300 - Social sciences
15
500 - Natural sciences & mathematics
14
363 - Other social problems & services
13
690 - Buildings
13
745 - Decorative arts
12
530 - Physics
10
628 - Sanitary & municipal engineering
10
641 - Food & drink
9
664 - Food technology
9
302 - Social interaction
8
331 - Labor economics
7
515 - Analysis
7
610 - Medicine & health
7
624 - Civil engineering
6
381 - Commerce
5
551 - Geology, hydrology & meteorology
5
577 - Ecology
5
370 - Education
4
541 - Physical chemistry
4
600 - Technology
4
616 - Diseases
4
001 - Knowledge
3
531 - Classical mechanics; solid mechanics
3
570 - Life sciences; biology
3
667 - Cleaning, color & coating technologies
3
677 - Textiles
3
000 - Computer science, information & general works
2
344 - Labor, social, education & cultural law
2
384 - Communications; telecommunication
2
510 - Mathematics
2
511 - General principles of mathematics
2
518 - Numerical analysis
2
537 - Electricity & electronics
2
547 - Organic chemistry
2
more ...