written rule system.  For the most part, subsequent releases
   until <span class="productname">Postgres95</span> (see below) focused on
   portability and reliability.
  </p><p>
   <span class="productname">POSTGRES</span> has been used to implement many
   different research and production applications.  These include: a
   financial data analysis system, a jet engine performance monitoring
   package, an asteroid tracking database, a medical information
   database, and several geographic information sys