A datacard is any removable computer component, approximately the size of a credit card, that contains data, or that contains nonvolatile memory to which data can be written and from which data can be recovered. The term is a synonym for smart card.
Some datacards are portable devices and include such components as flash memory modules and proprietary memory sticks. They are useful for the transfer of files among computers and for short-term data backup. Still other datacards are used with notebook computers to provide mobile wireless Internet access.
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