DocumentationMathematicaBuilt-in FunctionsNew in Version 3.xSystem Interface
$ProcessID gives the ID assigned to the Mathematica kernel process by the operating system under which it is run.
On operating systems where no process ID is assigned, $ProcessID is None.
See Section 2.14.5.
See also: $ParentProcessID, $UserName, Environment, $SessionID.
New in Version 3.