• Friday15th August 1975

    The Digital Group

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    The Digital Group was the first company to produce a system built around the Zilog Z80 processor. Their hobbyist-targeted products were based on a system of interchangeable boards and components which allowed users to upgrade to different CPUs without having to replace their peripherals. Their produ... see all details



  • Tuesday15th April 1975

    Processor Technology

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    Processor Technology Corporation was a personal computer company founded in April 1975 by Gary Ingram and Bob Marsh in Berkeley, California. Their first product was a 4K byte RAM board that was compatible with the MITS Altair 8800 computer but more reliable than the MITS board. This was followed by ... see all details



  • Monday14th April 1975

    Microsoft Inc.

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    Microsoft Corporation is an American multinational software corporation headquartered in Redmond, Washington that develops, manufactures, licenses, and supports a wide range of products and services related to computing. The company was founded by Bill Gates and Paul Allen on April 4, 1975. Microsof... see all details



  • Wednesday1st January 1975

    Ohio Scientific Inc.

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    Ohio Scientific Inc. (also known as Ohio Scientific Instruments) was a United States computer company that built and marketed microcomputers from 1975 to 1981. Their best known products were the Challenger series of microcomputers, but they also sold a variety of computer kits, single-board com... see all details



  • Wednesday1st January 1975

    Sphere Corporation

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    The Sphere I was a personal computer completed in 1975 by Michael Donald Wise of Sphere Corporation, of Bountiful, Utah. The Sphere I featured a Motorola 6800 CPU, onboard ROM, Monitor, 4 KB of RAM, and a keyboard with a numeric keypad. Sphere I. The Sphere I was among the earliest microcomputers. M... see all details