Subject:   -13- Why do I need Display PostScript?
Date: 21 Mar 1994 00:00:01 EST

  Impressario requires the Display PostScript software.  All SGI
  systems that were delivered from the factory with Irix 4.0.* or
  higher include Display PostScript.

  Systems delivered with an Irix release earlier then 4.0.* did not
  include Display PostScript.  In addition, the 4.0.* update to these
  systems did not include Display PostScript (requiring 4.0.* upgrade
  users to purchase Display PostScript).  This has changed: all Irix
  5.2 updates will include Display PostScript.