MMC

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 It has been more or less superseded by Secure Digital cards (SD card), but still sees significant use because MMCs can be used in most devices that support SD cards.