In July 1969, weeks before Apollo 11 launched, a NASA engineer named Jack Garman handwrote a list of every alarm code the Apollo Guidance Computer could throw and placed it under the plexiglass on his console — and when Margaret Hamilton’s software trigge
How a 24-year-old NASA engineer's handwritten alarm-code cheat sheet, taped to a Mission Control console three days before Apollo 11 launched, kept the first lunar landing from being aborted at 1,800…
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