Classification
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331 - Labor economics
1
341 - Law of nations
1
344 - Labor, social, education & cultural law
1
362 - Social welfare problems & services
1
371 - Schools & their activities; special education
1
384 - Communications; telecommunication
1
502 - Miscellany
1
514 - Topology
1
516 - Geometry
1
532 - Fluid mechanics; liquid mechanics
1
582 - Plants noted for characteristics & flowers
1
589 - [Unassigned]
1
611 - Human anatomy, cytology & histology
1
617 - Surgery & related medical specialties
1
623 - Military & nautical engineering
1
624 - Civil engineering
1
627 - Hydraulic engineering
1
634 - Orchards, fruits & forestry
1
636 - Animal husbandry
1
650 - Management & auxiliary services
1
663 - Beverage technology
1
665 - Industrial oils, fats, waxes & gases
1
667 - Cleaning, color & coating technologies
1
669 - Metallurgy
1
681 - Precision instruments & other devices
1
691 - Building materials
1
740 - Drawing & decorative arts
1
925 - (Optional number)
1