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Rag, or "smartrag" is a portable display screen of dark gray cloth with the consistency of fine silk. Human touch generates a static charge that stiffens the material into the consistency of cardboard, displaying information from a separate computer, or it can be programmed to display data held within its own internal memory. Crimping a corner causes it to revert to cloth. Cheap and disposable. Newspapers use the material, and are commonly called "newsrags."

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