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Secure
Digital Card
Secure Digital, or SD,
is flash
memory data
storage device based on Toshiba's
earlier Multi
Media Cards (MMC). SD is slightly thicker, and includes
features that allow the secure exchange of data, enabling usage
restrictions to placate copyright
holders. It has essentially replaced MMC outright.
It had been said that Secure Digital cards would become
ubiquitous, replacing diskettes, but since has failed to do so,
largely because of the popularity of USB
Keydrives. Its price is still prohibitively high, costing
more and holding less data then its main competition, the larger
Compact
Flash.
PDA
devices such as Pocket
PCs and Palm-powered
devices frequently feature SD slots. PalmOne,
HP, Dell,
Toshiba,
and other PDA manufacturers have made SD a standard on all of
their PDAs. Many of the Sharp
Zaurus
models also use the SD format. SD is fairly well supported in
the digital
camera industry as well, used in all Kodak
cameras.
It's also the memory of choice in some of Nokia's
higher end cell phones, such as the N-Gage
and the 36xx series. Olympus
also produced some cameras with SD capability, but abandoned it
in favor of its own xD-Picture
cards.
This
content from Wikipedia
is licensed under the GNU
Free Documentation License.
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