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Difference engine designed by Charles Babbage
ARP17A40_062

Difference engine designed by Charles Babbage

Portrait of Henry Andrews
ARP07095_390001142

Portrait of Henry Andrews

Clerk using a Pascal type of adding machine
ARP07094_390000972

Clerk using a Pascal type of adding machine

Pascal's digital counting machine (1642)
ARP07094_390000973

Pascal's digital counting machine (1642)

George and Edward Scheutz's calculating machine
ARP07094_390000970

George and Edward Scheutz's calculating machine

Hollerith tabulator which used a punched card memory system
ARP03098_005988

Hollerith tabulator which used a punched card memo...