Individual that composes instructions for computer systems to refer to when performing a given action. Programmers usually have an extensive background in some form of computer coding language, which may include XML, PHP, Perl, HTML, or SQL. Programmers are essential to the development of computers because without the coding that is necessary to make a computer work properly, the machine would be useless. Programmers may specialize in one area or may write instructions for a wide range of systems or programs.
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