History of Innovation

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1977: Apple ][ and the Commodore PET

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Innovation: Mass-Marketing of the Personal Computer
Location: United States
Year: 1977
By: Apple Computer and Commodore International

In June 1977 Apple ][ and the Commodore PET 2001 were introduced at the Las Vegas Consumers Electronics show and shortly after were brought to the public. Both of these computers originally had 4 KB of RAM and were built around a MOS Technology 6502 Microprocessor. The Apple ][ had basic sound and the first color screen making it popular for personal use [1]. Over the four years it was produced, 4 million Apple ][ were sold. The Commodore PET was the first computer to include the components as part of whole, with the monitor, keyboard, and circuitry combined as a single package [2]. Less than 1 million of the Commodore PETs were sold, but they were made popular in schools due to the sturdy construction. At the same time the TRS-80, produced by RadioShack, sold 1.5 million. These three computers were called the 1977 “Trinity,” and led the way for the expanded use of personal computers [3]. The wide spread use of the personal computer allowed for greater knowledge of the systems available and opened the door for further development of how computers could be used in professional situations.  `


Written by Morgan Allford

January 1, 1977 at 12:00 am

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