In 1905, when you went motoring, you took your mechanic. Twenty-five years later, mass production revolutionized the role of the automobile, but buying a Ford wouldn't have made sense if everyone still needed a mechanic on board. In 1955, when you used your computer, you took your programmer. Twenty-five years later, mass production revolutionized the role of the computer, but buying a micro wouldn't have made sense if everyone still needed a programmer.