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==In C and C++==
In C, and consequently C++, the <code>volatile</code> keyword was intended to:<ref name="auto">{{cite web |title=Publication on C++ standards committee|url= http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2016.html}}</ref>
*allow access to [[memory-mapped I/O]] devices
*allow uses of variables between <code>[[setjmp]]</code> and <code>longjmp</code>
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