Astron SoftCard
The Astron SoftCard is a ROM cartridge developed by Electronic Software as a software distribution medium for MSX computers. Astron SoftCards are approximately the size of a credit card but thicker, and incompatible with the similar Hudson Soft Bee Card, having 38 rather than 32 contact pads, though both used an adaptor inserted into a MSX cartridge slot, as the means connect the cards.