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Memory or RAM is the temporary working memory that your computer uses to
perform calculations and manipulate files. When you open a document, it is
copied from the hard drive into RAM. As you and your word processor work on the
file, the modified copy exists only in RAM. When you save the file, it is
copied from RAM back to the hard drive, or permanent storage. It is also the
place in a computer where the operating system, application programs, and data
in current use are kept so that they can be quickly reached by the computer's
processor.
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