VMS Help DTM, PLAY, Command Qualifiers, /REALTIME  *Conan The Librarian (sorry for the slow response - running on an old VAX)

   /REALTIME
   /NOREALTIME (D)

   Specifies that the speed of interactive terminal session file
   playback is to be based solely on the speed at which it was
   recorded and not on the rate at which the application being
   tested requests input.  This qualifier is useful for testing
   applications that request input before completing processing
   and display of data.