EntityQ1935523· pop 16· linked from 662 articlesSemi-Automatic Ground EnvironmentSign in to savehistoric computer networkConnectionsNorth American Aerospace Defense CommandEntityMIT Lincoln LaboratoryEntityCheyenne Mountain ComplexEntityIBMEntityMassachusetts Institute of TechnologyEntityUnited States Air ForceEntityUnited States NavyEntityMcDonnell Douglas F-4 Phantom IIEntityLockheed F-104 StarfighterEntityairborne early warning and command systemEntityConvair F-106 Delta DartEntityMcDonnell F-101 VoodooEntityidentification friend or foeEntityNorthrop F-89 ScorpionEntityMinot Air Force BaseEntityDistant Early Warning LineEntityBallistic Missile Early Warning SystemEntityStewart Air National Guard BaseEntityWorld War IIConceptSoviet UnionConceptCategories1950s computers1950s in technology1950s in the United StatesComputer networksComputer-related introductions in 1958Computer systems of the United States Air ForceNorth American Aerospace Defense CommandVacuum tube computers