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338 - Production 131 658 - General management 75 333 - Economics of land and energy 68 331 - Labor economics 46 622 - Mining and related operations 39 639 - Hunting, fishing & conservation 38 630 - Agriculture and related technologies 36 330 - Economics 24 339 - Macroeconomics and related topics 11 634 - Orchards, fruits, forestry 11 628 - Sanitary engineering 10 633 - Field and plantation crops 8 332 - Financial economics 6 621 - Applied physics 6 631 - Techniques, equipment & materials 6 641 - Food and drink 6 636 - Animal husbandry 5 336 - Public finance 4 614 - Forensic medicine; incidence of disease 4 635 - Garden crops (Horticulture) 4 663 - Beverage technology 4 610 - Medicine and health 3 627 - Hydraulic engineering 3 650 - Management and auxiliary services 3 600 - Technology (Applied sciences) 2 607 - Education, research, related topics 2 613 - Personal health & safety 2 615 - Pharmacology and therapeutics 2 647 - Management of public households 2 664 - Food technology 2 666 - Ceramic & allied technologies 2 675 - Leather and fur processing 2 677 - Textiles 2 306 - Culture and institutions 1 334 - Cooperatives 1 337 - International economics 1 597 - Cold-blooded vertebrates 1 603 - Dictionaries, encyclopedias, concordances 1 620 - Engineering and allied operations 1 623 - Military and nautical engineering 1 625 - Engineering of railroads and roads 1 629 - Other branches of engineering 1 637 - Processing dairy and related products 1 640 - Home and family management 1 657 - Accounting 1 660 - Chemical engineering 1 667 - Cleaning, color & coating technologies 1 672 - Iron, steel, other iron alloys 1 681 - Precision instruments and other devices 1 692 - Auxiliary construction practices 1