$SessionID

$SessionID
is a number set up to be unique to a particular Wolfram System session.

DetailsDetails

  • $SessionID should be different for different Wolfram System sessions run either on the same computer or on different computers.
  • The value of $SessionID is based on $MachineID, as well as AbsoluteTime[] and operating system parameters such as the Wolfram System process ID.
Introduced in 1991
(2.0)