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CMS EXEC
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<p>CMS EXEC, or EXEC, is an interpreted, command procedure control, computer <a href="/facts/Scripting_language/8pF4ajBL">scripting language</a> used by the CMS EXEC Processor supplied with the <a href="/facts/IBM/QszA7nwd">IBM</a> <a href="/facts/Virtual_Machine/BLevU3sx">Virtual Machine</a>/<a href="/facts/Conversational_Monitor_System/qmWXRkQT">Conversational Monitor System</a> (<a href="/facts/VM%2fCMS/Ymu9SRtX">VM/CMS</a>) operating system. </p><p>EXEC was written in 1966 by <a href="/facts/Stuart_Madnick/SwqqRDx6">Stuart Madnick</a> at MIT on the model of <a href="/facts/Compatible_Time_Sharing_System/LAIsUSEq">CTSS</a> <a href="/facts/RUNCOM/qk146j76">RUNCOM</a>. He originally called this processor COMMAND, and it was later renamed EXEC. </p><p>CMS EXEC has been superseded by <a href="/facts/EXEC_2/GfVWNLu3">EXEC 2</a> and <a href="/facts/REXX/hAzh6FeR">REXX</a>. All three — CMS EXEC, <a href="/facts/EXEC_2/GfVWNLu3">EXEC 2</a> and <a href="/facts/REXX/hAzh6FeR">REXX</a> — continue to be supported by the <a href="/facts/Conversational_Monitor_System/qmWXRkQT">IBM CMS product</a>. </p>