$ SPAWN
  %DCL-S-SPAWNED, process SYSTEM_1 spawned
  %DCL-S-ATTACHED, terminal now attached to process SYSTEM_1
  $ RUN SYS$SYSTEM:SYSMAN
  SYSMAN> ATTACH SYSTEM
  %DCL-S-RETURNED, control returned to process SYSTEM
  $

      In this example, the SPAWN command creates a subprocess
      (SYSTEM_1). After you invoke SYSMAN and enter the ATTACH
      command, you transfer the terminal's control back to the parent
      process (SYSTEM).