<Li> October 1977: Commodore PET (N. Am .), first all - in - one computer: keyboard / screen / tape storage built into stamped sheet metal enclosure . </Li> <P> The following computers also introduced significant advancements to the home computer segment: </P> <Ul> <Li> 1979: TI - 99 / 4, first home computer with a 16 - bit processor and first to add sprite graphics </Li> <Li> 1979: Atari 400 / 800 (N. Am .), first computer with custom chip set and programmable video chip and built - in audio output </Li> </Ul> <Li> 1979: TI - 99 / 4, first home computer with a 16 - bit processor and first to add sprite graphics </Li>

When was the first computer sold in stores