Reduced-Size Multi-Media Card
A type of removable flash memory card.
Like any flash memory card, it can be used to store various types of files, including photos, videos, music, or software.
RS-MMC is similar to the MMC format, but smaller. See MMC.
RS-MMCis smaller than MMC and SD, but larger than TransFlash. RS-MMC is close in size to the competing miniSD format.