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The Osborne 1, the world's first commercially produced computer designed to be portable, is 30 years old this month.
Adam Osborne, founder of the Osborne Computer Corporation, introduced the 11kg machine in April 1981, though it didn't go into mass production until June 1981.
Osborne 1
It was not the first machine of its kind, though it was the first portable machine people could buy. Five years previously, technologist Alan Kay had conceived - and colleagues Doug Fairbairn, Adele Goldberg and Larry Tesler built - a portable computing prototype called the NoteTaker. The device was created at Xerox's technology hothouse, the Palo Alto Research Centre. Fairbairn and co. went on to construct nine further prototypes.