During an Apollo 11 landing simulation, Margaret’s toddler pressed a button which overloaded the computer with input and it crashed.
After seeing this, she suggested the software implement priority programming so that the computer could focus on important calculations, such a landing.
Her superiors thought the astronauts would not do anything out of order. Margaret implemented it anyway.
Needless to say, something went wrong during landing and Margaret’s software saved the mission.
Margaret’s work was the foundation for ultra-reliable software design, and whenever I’m designing software I think, “what would Margaret do?””
https://en.wikipedia.org/wiki/Margaret_Hamilton_(scientist)