D3 MANAGING DATA FILES
Related topics can be found in Section F1 Word processing and text manipulation, Section B4 Commercial data processing, Section F2 Spreadsheets, Section B3 Data handling and information retrieval, Section E3 Memory, Section D1 Data representation and Section D2 Numeric data representation.
Computer users tend to keep their programs separate from the data they operate on. The data is usually held as one or more files on backing storage, and the systems software encourages the user to believe that the file is held here (for example, on a disk) all the time. In fact, when a program wishes to use the data in a file, it is necessary for the portion of the file being worked on to be copied into primary storage in order to ...
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