A CDE Definition
xD Picture Card
(EXtreme Digital Picture Card) An earlier flash memory card used in digital cameras. Introduced in 2002 by Fuji and Olympus, the xD cards were the smallest flash memory cards on the market until the Mini SD card was announced in 2003. xD Cards provided low-power, high-speed data transfer up to 5 Mbytes/sec in capacities to 512MB. In order to accommodate the new format, Olympus introduced new cameras that accepted xD Cards, CompactFlash and SmartMedia formats. See memory card.
xD Picture Card Module
(1) A user-replaceable module in a computer that holds RAM chips. "Memory card" mostly refers to flash chips in definition #2 below. See memory module.
(2) A removable module that contains non-volatile flash memory chips used for storage in digital cameras and mobile devices. The major card types are SD Cards, Memory Sticks and CompactFlash; the SD Card family being the most popular. See flash memory, memory card reader, SD Card, Memory Stick and CompactFlash.
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