Machines with interchangeable parts can now be constructed with great economy of effort. In spite of much complexity, they perform reliably. Witness the humble typewriter, or the movie camera, or the automobile. (Vannevar Bush)

Machines with interchangeable parts can now be constructed with great economy of effort. In spite of much complexity, they perform reliably. Witness the humble typewriter, or the movie camera, or the automobile.

Vannevar Bush

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camera complexity economy effort great humble interchangeable now spite typewriter witness movie automobile parts

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