Data storage is the recording (storing) of information (data) in a storage medium. Handwriting, phonographic recording, magnetic tape, and optical discs are all examples of storage media. Some authors even propose that DNA is a natural data storage mechanism. Recording may be accomplished with virtually any form of energy. Electronic data storage requires electrical power to store and retrieve data.
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|Computer memory and data storage types|
Data storage in a digital, machine-readable medium is sometimes called digital data. Computer data storage is one of the core functions of a general-purpose computer. Electronic documents can be stored in much less space than paper documents. Barcodes and magnetic ink character recognition (MICR) are two ways of recording machine-readable data on paper.