Classification
660 - Chemical engineering
312
620 - Engineering & allied operations
70
621 - Applied physics
61
670 - Manufacturing
39
547 - Organic chemistry
35
541 - Physical chemistry
34
546 - Inorganic chemistry
25
363 - Other social problems & services
19
641 - Food & drink
16
664 - Food technology
16
543 - Analytical chemistry
15
677 - Textiles
8
662 - Explosives, fuels & related products
7
540 - Chemistry & allied sciences
6
629 - Other branches of engineering
6
536 - Heat
5
628 - Sanitary & municipal engineering
5
658 - General management
5
530 - Physics
4
572 - Biochemistry
4
579 - Microorganisms, fungi & algae
4
624 - Civil engineering
4
690 - Buildings
4
333 - Economics of land & energy
3
519 - Probabilities & applied mathematics
3
551 - Geology, hydrology & meteorology
3
604 - Special topics
3
615 - Pharmacology & therapeutics
3
616 - Diseases
3
006 - Special computer methods
2
338 - Production
2
539 - Modern physics
2
570 - Life sciences; biology
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
900 - History & geography
2
000 - Computer science, information & general works
1
003 - Systems
1
005 - Computer programming, programs & data
1
330 - Economics
1
361 - Social problems & social welfare in general
1
370 - Education
1
514 - Topology
1
518 - Numerical analysis
1
520 - Astronomy & allied sciences
1
531 - Classical mechanics; solid mechanics
1
532 - Fluid mechanics; liquid mechanics
1
533 - Gas mechanics
1
571 - Physiology & related subjects
1
627 - Hydraulic engineering
1
more ...