SWTPC 6800 Computer System 1975 Published September 17, 2020 at 2048 × 1536 in Les pionniers de l’informatique à l’école SWTPC 6800 Computer System introduced by Southwest Technical Products Corp. of San Antonio, Texas in November 1975 and sold for $450. This computer used the Motorola 6800 microprocessor and peripherals.