MultiMediaCard (MMC) A MultiMediaCard (MMC) is a tiny memory card that uses flash memory to make storage portable among various devices, such as car navigation systems, cellular phones, eBooks, PDAs, smartphones, and digital cameras, music players, and video camcorders, and personal computers. MMC was jointly developed by SanDisk and Siemens AG/Infineon Technologies AG, who introduced the product in 1997. About the size of a postage stamp, MMC weighs approximately two grams. This is similar...