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Sub-Categories Building Construction Chemical Technology Electrical Engineering (and computer networks); Nuclear Engineering Engineering (General and Civil) General Highways, Railways, and Bridges Home Economics (including food and cooking) Hydraulic and Ocean Engineering Manufacturing, Arts and Crafts Mechanical Engineering Mining and Metallurgy Motor Vehicles, Air and Space Technology Photography

Free Technology Books - Photography A Manual of Photography by Mathew Carey Lea (page images at MOA) The American Hand Book of the Daguerreotype by S. D. Humphrey (Gutenberg text) The History and Practice of the Art of Photography by Henry H. Snelling (Gutenberg text)