Hard copy is in output form that continues to be published in writing. Hard copies allow information to be read with no need of the computer and therefore are frequently needed when somebody must sign a report. After printing the hard copy it cannot be altered. For example book, newspapers and any written material.
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Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone.