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Definition: Commodore PET

(Commodore Personal Electronic Transactor) The first personal computer from Commodore Business Machines. Introduced in 1977, the PET, along with the Apple II and TRS-80, launched the personal computer industry. See Commodore and Commodore 64.

With a whopping 4K of RAM, the PET cost $595. It had a built-in tape cassette for storage (on the left) and a chiclet keyboard. (Image courtesy of Steven Stengel, www.oldcomputers.net)