You'll be amazed to hear that the world's first PDA was released in 1958 by IBM. This PDA card is a piece of stiff paper that holds digital data made up by the presence or absence of holes in predefined positions.
At present an outdated taping medium, this type of cards were widely applied throughout the 19th century for commanding textile looms and in the late 19th and early 20th century for engaging fairground organs and associated tools. Former digital calculators used punched cards, often developed using keypunch machines, as the basic medium for input of both computer programs and data. Some voting machines use punched cards.
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