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Without software, computer hardware would have nothing to do. Computers need to be told exactly what to do, and software is the set of codes that gives the computer those instructions. It comes in the form of the familiar prepackaged software that you find in a computer store, such as games, word processing, spreadsheet, and desktop publishing programs, and in customized applications designed to fit specific needs of a particular business. Software designers are the initiators of these complex programs. Computer programmers then create the software by writing the code that carries out the directives of the designer.