option(1) In command-driven interfaces, an option is an addition to a command that changes or refines the command in a specified manner. As the term implies, options are just that -- they are not required.
In the DOS operating system, options are preceded by a slash (/). For example the DIR command supports the /P option, which causes the system to pause between screenfuls of data. Other operating systems and applications have different rules for specifying options.
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