Programma 101
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The Olivetti Programma 101, also known as Perottina or P101, is one of the first "all in one" commercial desktop programmable calculators, although not the first. Produced by Italian manufacturer Oliv
A Programma 101
Pier Giorgio Perotto, Giovanni De Sandre, Gastone Garziera, and Giancarlo Toppi, the Programma 101 team (except Giuliano Gaiti) at the Olivetti Laboratory (c. 1962–1964)
Layout of the keyboard
Olivetti P101 magnetic card
Pier Giorgio Perotto
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Pier Giorgio Perotto was an Italian electrical engineer and inventor. Working for the manufacturer Olivetti, he led a design team that built the Programma 101, one of the world's first programmable ca
Programma 101
…programmable calculators, although not the first. Produced by Italian manufacturer Olivetti, based in Ivrea, Piedmont, and invented by the Italian engineer Pier Giorgio Perotto, the P101 used many features of large computers of that period. It was launched at the 1964 New York World's Fair; volume production started in 1965…
Front view of a Programma 101 at the National Museum of Computing in Bletchley Park