Perimeter Acquisition Radar The PAR provided both early warning of a ballistic missile attack and preliminary trajectories of threatening warheads.
Missile Site Radar The MSR orchestrated the destruction of threatening warheads by intercepting them with Spartan and Sprint defensive missiles.
Missiles Two defensive missiles were used: Spartan for long range (exo-atmospheric) interception and Sprint for "last ditch" interception.
Remote Sprint Launch Sites The four geographically dispersed RSL's were employed to minimize flyout time for Sprint's "last ditch" interception.
Ballistic Missile Defense Center The BMDC was the superior command authority to which the twelve planned Safeguard tactical sites would report.
Safeguard Communications Agency SAFCA provided the secure network that tied the various sites into one co-ordinated weapon system.
Data Processing System The custom built DPS controlled the radars and defensive missiles.

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