Explore Catalog by Filters

621 - Applied physics 9,444 620 - Engineering and allied operations 4,861 629 - Other branches of engineering 4,132 628 - Sanitary engineering 2,499 624 - Civil engineering 1,962 622 - Mining and related operations 1,339 623 - Military and nautical engineering 1,197 627 - Hydraulic engineering 534 625 - Engineering of railroads and roads 497 669 - Metallurgy 131 553 - Economic geology 48 557 - Earth sciences of North America 43 338 - Production 40 602 - Miscellany 34 081 - General collections in American English 23 551 - Geology, hydrology, meteorology 21 333 - Economics of land and energy 18 666 - Ceramic & allied technologies 14 363 - Other social problems and services 13 388 - Transportation 13 510 - Mathematics 12 626 - [Unassigned] 11 681 - Precision instruments and other devices 11 690 - Construction of buildings 11 549 - Mineralogy 10 630 - Agriculture and related technologies 9 662 - Explosives, fuels & related products 8 546 - Inorganic chemistry 7 671 - Metalworking & primary metal products 7 300 - Social sciences 6 541 - Physical chemistry 6 661 - Technology of industrial chemicals 6 616 - Diseases 5 668 - Technology of other organic products 5 384 - Communications 4 387 - Water, air, space transportation 4 500 - Natural sciences and mathematics 4 523 - Specific celestial bodies and phenomena 4 530 - Physics 4 537 - Electricity and electronics 4 631 - Techniques, equipment & materials 4 639 - Hunting, fishing & conservation 4 658 - General management 4 665 - Industrial oils, fats, waxes & gases 4 672 - Iron, steel, other iron alloys 4 699 - [Unassigned] 4 791 - Public performances 4 001 - Knowledge 3 016 - Of works on specific subjects 3 309 - [Unassigned] 3 359 - Sea forces and warfare 3 538 - Magnetism 3 539 - Modern physics 3 550 - Earth sciences 3 574 - [Unassigned] 3 599 - Mammalia 3 670 - Manufacturing 3 673 - Nonferrous metals 3 720 - Architecture 3 778 - Specific fields & kinds of photography 3 926 - (Optional number) 3 940 - History of Europe 3 004 - Computer science 2 006 - Special computer methods 2 025 - Operations of libraries and archives 2 082 - General collections in English 2 331 - Labor economics 2 380 - Commerce, communications, transportation 2 389 - Metrology and standardization 2 508 - Natural history 2 519 - Probabilities and applied mathematics 2 533 - Pneumatics (Gas mechanics) 2 536 - Heat 2 609 - History, geographic treatment, biography 2 610 - Medicine and health 2 632 - Plant injuries, diseases, pests 2 656 - [Unassigned] 2 660 - Chemical engineering 2 693 - Specific materials & purposes 2 697 - Heating, ventilating & air-conditioning 2 900 - History & geography 2 910 - Geography and travel 2 970 - History of North America 2 003 - Systems 1 062 - General organizations in British Isles 1 080 - General collections 1 083 - General collections in other Germanic languages 1 092 - Block books 1 219 - [Unassigned] 1 301 - Sociology and anthropology 1 302 - Social interaction 1 306 - Culture and institutions 1 307 - Communities 1 332 - Financial economics 1 336 - Public finance 1 343 - Military, tax, trade & industrial law 1 347 - Procedure and courts 1 355 - Military science 1 358 - Air & other specialized forces 1 362 - Social problems and services to groups 1