Enterprise Systems Corporation Deploys Nortel Norstar Communications System for Raytheon Corporation

HOUSTON, TEXAS - June, 2005 - Enterprise Systems Corporation announced today that Enterprise Systems Corporation has been selected to decommission a Nortel Option 51C and install a Norstar MICS system at Raytheon's NASA facilities outside Houston, Texas. Raytheon had undergone significant cutbacks and determined the Norstar better fit the current business needs. Texas Genco Energy selects