Classification
prev ...
622 - Mining & related operations
1
624 - Civil engineering
6
628 - Sanitary & municipal engineering
8
629 - Other branches of engineering
6
631 - Techniques, equipment & materials
3
632 - Plant injuries, diseases & pests
1
636 - Animal husbandry
2
639 - Hunting, fishing & conservation
1
641 - Food & drink
1
658 - General management
7
660 - Chemical engineering
22
661 - Industrial chemicals
1
662 - Explosives, fuels & related products
4
663 - Beverage technology
2
664 - Food technology
1
665 - Industrial oils, fats, waxes & gases
6
666 - Ceramic & allied technologies
1
669 - Metallurgy
4
670 - Manufacturing
4
671 - Metalworking & primary metal products
7
672 - Iron, steel & other iron alloys
1
681 - Precision instruments & other devices
6
701 - Philosophy of fine & decorative arts
1
720 - Architecture
1
743 - Drawing & drawings by subject
1
781 - General principles & musical forms
1
808 - Rhetoric & collections of literature
5
910 - Geography & travel
2