h6. [[Programmer's Reference Manuals]] h6(. » [[*Commands]] h6((. » *Unset h2. *Unset h4. Use This *Command deletes a system variable. h4. Syntax *Unset _var_spec_ h4. Parameters |<^{width:8em}. _var_spec_|<^. Variable name, or a wildcarded specification for a single variable name| h4. Notes If no variable name is given, all system variables are displayed. h4. See also * [[OS_SetVarVal]] * [[*Set|*Set]] * [[*SetEval|*SetEval]] * [[*SetMacro|*SetMacro]] [link3]Expressions