xD-Picture Card is a type of flash memory card, used mainly in digital cameras. xD originally stood for extreme Digital. The cards were developed by Olympus and Fujifilm, and introduced into the market in July 2002. Toshiba Corporation and Samsung Electronics manufacture the cards for Olympus and Fujifilm. xD cards are now sold under other brands, including Kodak, SanDisk, PNY, and Lexar, but are not branded with the respective companies' logos, except for Kodak.
xD cards are used in Olympus and Fujifilm digital cameras and Olympus digital voice recorders; Fujifilm also made an MP3 player (xD-MP3) that used the cards. As of 2008[update], xD cards are available in capacities of 16 MiB up to 2 GiB.
As of June 2009[update], it appears that Olympus is beginning to move away from the xD card with the release of the E-P1 camera; it supports only SD memory cards. Likewise, Fuji has also phased out support for xD in favor of SD and SDHC.