Archive · 9 Oct 2026
Apollo Software Pioneer Margaret Hamilton Dies at 90
Margaret Hamilton was a computer scientist who helped write the software for the Apollo missions.
Her team’s software helped guide astronauts toward the Moon.
During Apollo 11’s landing, two alarms appeared in the spacecraft.
The software handled the problem by restarting and focusing on the most important tasks.
Mission controllers decided the landing could continue.
Apollo 11 landed on the Moon in 1969.
Hamilton helped make software engineering a recognized idea.
She died at age 90, and her work was honored with major awards.
Margaret Hamilton, who led development of Apollo guidance software, died on September 30 at age 90.
During Apollo 11’s 1969 lunar descent, 1201 and 1202 alarms triggered; the software prioritized critical tasks and restarted itself.
Hamilton’s software team helped the mission continue to a successful landing after controllers assessed the alarms.
She led the MIT Instrumentation Laboratory division responsible for Apollo guidance, navigation and control software.
Hamilton was credited with popularizing “software engineering” and received the Presidential Medal of Freedom in 2016.
- Who
- Margaret Hamilton, computer scientist and leader of the Apollo software team.
- What
- Hamilton died at age 90; she led development of Apollo guidance, navigation and control software.
- When
- She died on September 30; MIT announced her death on Wednesday. The article does not specify the year of her death.
- Where
- MIT announced her death. She was born in Indiana and worked at MIT.
- Why
- The article does not state a cause of death.
Landing concern
Software response
Apollo 11 alarms
Landing concern
The 1201 and 1202 alerts raised concern during the lunar module’s descent; a similar alert had caused controllers to abort a pre-mission simulation.
Software response
The software restarted itself and reduced its workload to high-priority tasks, helping controllers decide to proceed with the landing.
- Age
- 90
- Date of death
- September 30; year not specified in the article
- Apollo 11 landing
- July 20, 1969
- Landing alarms
- 1201 and 1202
- Apollo programme
- Ran from 1961 to 1972
- Presidential Medal of Freedom
- Awarded to Hamilton by President Barack Obama in 2016
- NASA recognition
- NASA gave Hamilton a special award in 2003 for her role in developing Apollo software