The Most Important Computer You’e Never Heard Of

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The Semi-Automatic Ground Environment, or SAGE, was highly sophisticated for the late 1950s. Spanning the US and Canada, it was an air monitoring system that scanned the skies for Soviet bombers during the Cold War. For it to work, it needed to be able to select targets on the radar, which was a problem because the computer mouse had yet to be invented. Enter the “Light Gun,” a pistol-shaped device that operators would point on the screen to select targets for track identification, interception, or ground-to-air missile targeting. Read full article here

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