igital 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
When introduced in 2002, xD Cards were the smallest memory card on the market.