The independent inquiry board set up to investigate the first explosive failure said the flight control system failed because of errors in computer software design.

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Before joining Linear, he taught at the Massachusetts Institute of Technology, where he used a surplus flight computer from an Intercontinental Ballistic Missile to research the control of fermentation for use in fields such as pharmaceutical production.

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The difference between the Montrose rig-simulator and (say) a flight simulator is that it is not completely under the computer's control.

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