The United States Department of Defense uses a Linux operating system - "the U.S. Army is “the” single largest install base for Red Hat Linux"[30] and the US Navy nuclear submarine fleet runs on Linux.[31]
In April 2006, the US Federal Aviation Administration announced that it had completed a migration to Red Hat Enterprise in one third of the scheduled time and about 15 million dollars under budget. The switch saved a further $15 million in datacenter operating costs.[33][34]
The city government of Largo, Florida, USA uses Linux and has won international recognition for their implementation, indicating that it provides "extensive savings over more traditional alternatives in city-wide applications."[36]
Each year more and more businesses and government entities make the switch to Linux for cost benefits and greater computing power. Every Linux operating system continues to improve year after year, and the reliability is unmatched.