 Casio has also known to use similar cartridges known as "ROM Pack" in the 1980s, before Yamaha's "Music Cartridge" were introduced.Few examples are several models in Casiotone line of portable electronic keyboards.Amstrad

Atari

Bandai

Coleco

Fairchild Semiconductor

Fisher Price

LeapFrog

Magnavox/Philips

Mattel

Milton Bradley

NEC

Nikko Europe

Nintendo

Nokia

Sega

SNK

Sony