* the Acorn Z80 Second Processor expansion for the [[BBC Micro]]
* the popular Z-80 SoftCard expansion for the [[Apple II]]
* the [[C64 ]] had a Z80 CP/M expansion cartridge, although it was not very usable due to its 40-column display
The best-selling devices to feature a Zilog Z80 are the [[Sega MegaDrive]] with 40 million units sold [https://segaretro.org/Sega_Mega_Drive#:~:text=The%20Mega%20Drive%20is%20Sega%27s,and%203%20million%20in%20Brazil. Source], and the TI graphing calculators with 90 million units sold [https://drive.google.com/file/d/1PshC6_lvHiBqry2ASsZ5D0AonmW01nxQ/view Source].