Margaret Hamilton — Apollo Guidance Software

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#003 · Women in TechIconicLocked in

Apollo Guidance Software

The code that landed Apollo 11, and the phrase software engineering

Rating

96Impact score

Technical depth96

Went first97

Openness86

Influence95

Domains

Flight softwareFault toleranceSoftware engineering

Scouting report

Led the team that wrote the Apollo onboard flight software at MIT, including the priority scheduling that let the guidance computer shed lower-priority work during the 1202 alarms three minutes before the lunar landing rather than fail. She coined the term software engineering, partly to get the discipline taken seriously.

Curator’s note

The landing happened because her code knew what to drop under load.

Sources