Classification
620 - Engineering & allied operations
33
621 - Applied physics
20
660 - Chemical engineering
14
628 - Sanitary & municipal engineering
8
624 - Civil engineering
5
671 - Metalworking & primary metal products
5
681 - Precision instruments & other devices
5
005 - Computer programming, programs & data
4
665 - Industrial oils, fats, waxes & gases
4
808 - Rhetoric & collections of literature
4
616 - Diseases
3
662 - Explosives, fuels & related products
3
669 - Metallurgy
3
670 - Manufacturing
3
006 - Special computer methods
2
025 - Library operations
2
333 - Economics of land & energy
2
512 - Algebra
2
610 - Medicine & health
2
631 - Techniques, equipment & materials
2
636 - Animal husbandry
2
663 - Beverage technology
2
910 - Geography & travel
2
152 - Perception, movement, emotions & drives
1
355 - Military science
1
518 - Numerical analysis
1
530 - Physics
1
535 - Light & infrared & ultraviolet phenomena
1
539 - Modern physics
1
571 - Physiology & related subjects
1
572 - Biochemistry
1
612 - Human physiology
1
629 - Other branches of engineering
1
632 - Plant injuries, diseases & pests
1
639 - Hunting, fishing & conservation
1
661 - Industrial chemicals
1
664 - Food technology
1
666 - Ceramic & allied technologies
1
672 - Iron, steel & other iron alloys
1