Adding Machine Small 320×224 Medium 640×447 Large 1024×716 Download Tiff Original 2400×1678 | (1.2 MB) Description Used in businesses and bookkeeping, the adding machine was a device used for calculations. "One of the first successful adding and listing machines (courtesy of the Burroughs Adding Machine Company)." -Hill, 1921 Keywords adding machine, bookkeeping, Burroughs, business, calculate, calculator, math Galleries Calculators Source: Hill, Henry Chase The Wonder Book of Knowledge (Philadelphia, PA: John C. Winston Company, 1921) Courtesy the private collection of Roy Winkelman
