MMC
From bildr
The MultiMediaCard (MMC) is a flash memory memory card standard. MMC is about the size of a postage stamp: 24 mm × 32 mm × 1.4 mm. MMC originally used a 1-bit serial interface, but newer versions of the specification allow transfers of 4 or 8 bits at a time. It has been more or less superseded by Secure Digital cards (SD card), but still sees significant use because MMCs can be used in most devices that support SD cards.
References
This page is an Article on bildr. Articles are pages that define or explain a concept, method, or generic item.