(1) A process by which VTAM automatically creates a session-initiation request to establish a session between two logical units (LUs). The session is between a designated primary logical unit (PLU) and a secondary logical unit (SLU) that is neither queued for nor in session with another PLU.
(2) In VM, a process by which a virtual machine is initiated by other than the user of that virtual machine; for example, the primary VM operator's virtual machine is activated automatically during VM initialization.
(3) The option of IMS to automatically create a VTAM session for a non-signed-on user to whom output has been made available.