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The first desktop and mass-market computer. In 1964, the first desktop computer, the Programma 101, was unveiled to the public at the New York World's Fair. It was invented by Pier Giorgio Perotto and manufactured by Olivetti. About 44,000 Programma 101 computers were sold, each with a price tag of $3,200.
Â· just now. Report Abuse. The first computers were wired together using electrically activated switches, either relays or vacuum tubes. A relay-based computer was started in Germany in 1933, but didn't get funding because the new Nazi government did not see a use for it (thankfully!). The first operational computer was called ENIAC and was was built using miles of wire and thousands of vacuum tube switches. Built in the 1940's, it was used in the development of the nuclear bomb.