xD-Picture Card is the proper form of the name—not XD- Use of the uppercase X is due to a known limitation of the MediaWiki software used for this site.
|Olympus 2 GB xD-Picture Card|
image by Huang Yu Ming (Image rights)
The xD-Picture card is one type of removable flash memory, used by Olympus & Fuji as digital film in their cameras. Currently available up to a maximum of 2GB.
Like Sony's Memory Stick, xD was not as successful as hoped and fell technically behind Secure Digital. For this reason, Fuji began double xD / Secure Digital slots in their compact cameras from the FinePix F40fd onward. Olympus was more resistant to dropping the xD format, instead adding software rather than physical compatibility for SD, allowing smaller form factor SD cards to be used via an adaptor. Around 2009 Olympus phased out xD in favor of Secure Digital/SDHC cards alone.
- Fijifilm xD-Picture Card™ and Adapters page (archived) with compatibility list.
- Olympus microSD card compatibility list.