MILNET

MILNET (Military Network) is a private internet network owned and used by the United States Military during the events of Deus Ex. The servers for this network are located in the Vandenberg Military base in California. Although JC Denton visits the facility to meet Gary Savage of X-51 and use the Universal Constructor, Daedalus will alert the player that it is quickly failing due to Icarus' interference and needs MILNET access to stay "alive". After JC gives it MILNET access, Daedalus and Icarus will merge to become one AI, Helios.

Trivia
In real life, MILNET was a real portion of the ARPANET Network used by the U.S. Department of Defense for exchanging secretive, but not confidential information. In the 1990's, MILNET became known as the Non-classified Internet Protocol Router Network, or NIPRNet.