*^C			! Return from program session to EXEC
  ^C			! (only single ^C will echo).

  @KEEP			! Create separate address space for
  			! new program.

  @MM                   ! Start new program.

  ...			! Use program.

  MM>^C			! Return from second program to EXEC.

  @INFORMATION FORK-STATUS
  			! List forks in current EXEC.
  			! (Current fork marked with "=>".)

      TECO (1): Kept, ^C from IO wait at TYI+3, 0:00:00.0
   => MM (2): ^C from IO wait at $COMND+3, 0:00:00.0

  @FORK TECO		! Switch to original program's fork
  			! ("TECO").

  @CONTINUE		! Return to original program session.

  ...			! Use original program.

  *^C			! Return to EXEC.

  @INFORMATION FORK-STATUS
   => TECO (1): Kept, ^C from IO wait at TYI+3, 0:00:00.0
      MM (2): ^C from IO wait at $COMND+3, 0:00:00.0

  @FORK MM		! Switch to second program fork ("MM").

  @CONTINUE		! Resume second program session.