$WAIT

   The Wait service suspends image execution until an asynchronous
   file or record service completes. The same control block that
   is used with the asynchronous file or record service call is
   specified as the parameter for the Wait service. If it is an
   asynchronous file service, the control block is a FAB; if it is
   an asynchronous record service, the control block is a RAB. Upon
   completion of the service, RMS returns control to your program at
   the point following the Wait service call.

                        RAB64 USERS (ALPHA ONLY)

      On Alpha systems, RAB64 can replace the RAB or RAB prefix
      wherever it is used with the Wait service on OpenVMS Alpha
      systems.

   Format

     SYS$WAIT  control-block
 

Additional information available:

Returns         Argument        Condition_Values_Returned