A state-of-the-art computer system serves the entire installation. This allows characters to make full use of the Technology skill and the computer can be programmed to handle routine base functions (including monitoring communications channels and controlling defensive systems). An artificially intelligent computer system should be created as a Minion or Sidekick, perhaps with the cost shared among members of a team. See Constructs for more.
D20 Hero SRD Installations Article - http://www.d20herosrd.com/7-gadgets-gear/installations