Margaret Hamilton, the pioneering computer scientist who led the team that developed onboard flight software for NASA's Apollo moon missions, has died at the age of 90. She later became an influential symbol of women's achievements in technology.
Hamilton died on Sept 30 at a hospital in Cambridge, Massachusetts, her daughter, Lauren Hamilton, told The Associated Press on Thursday. NASA Administrator Jared Isaacman said on social media platform X that her work helped make humanity's first journeys to the Moon possible.
Calling Hamilton a trailblazer, Olivier de Weck, an Apollo programme professor at the Massachusetts Institute of Technology (MIT) and interim head of its aeronautics and astronautics department, said her achievements went far beyond being ahead of her time.
Hamilton worked as a software engineer when the field was still developing. She wrote advanced computer code herself and led a team that used the emerging technology to build one of the most complex systems of its time, de Weck told MIT News, the university's news publication.
In recent years, Hamilton gained wider public recognition through a photograph showing her in her early 30s standing beside a towering stack of computer code pages used in the Apollo programme.
She was also featured as a figure in a Lego set celebrating women at NASA, unveiled in 2017. The 50th anniversary of the Apollo 11 Moon landing in 2019 further increased public interest in her contributions, her daughter said.
Lauren Hamilton said her mother went from being relatively unknown to widely recognised, particularly within the technology sector. Although she appreciated the recognition, she was naturally reserved and not accustomed to being in the spotlight, her daughter added.
Born in Indiana on Aug 17, 1936, Hamilton earned a mathematics degree from Earlham College in Richmond, Indiana, in 1958. She joined MIT in 1959, initially working with a meteorology professor on software for weather forecasting.
In the mid-1960s, she joined MIT's Instrumentation Laboratory, which held a NASA contract for the Apollo programme.
Hamilton initially worked on software for uncrewed space missions before leading the team responsible for onboard flight software for crewed missions. By 1968, she was an assistant director overseeing the command and service module team, according to MIT News.
In a 2009 interview with the publication, Hamilton recalled that many members of her team began working on the programme while in their 20s and treated their responsibilities seriously.
“Coming up with solutions and new ideas was an adventure,” she said.
She explained that software was still poorly understood at the time, giving the team considerable freedom and trust from senior management.
“We had to find a way, and we did,” she said, adding that the team had been fortunate to work during a period when they had to pioneer new approaches.
Hamilton continued working at the Instrumentation Laboratory into the 1970s before founding two software companies, MIT News reported.
Her daughter said Hamilton was particularly interested in abstract mathematics and how ideas could be translated into software.
She also described her mother as an eccentric and fun-loving person who collected vintage clothing and had a mischievous sense of humour.
Despite facing sexism in the technology field, Hamilton rarely responded aggressively, her daughter said. Instead, she used humour to disarm critics or quietly established her authority.
Hamilton grew up mainly in Michigan's Upper Peninsula and lived in Cambridge from her early 20s until her death, according to her daughter.
Among her many honours, Hamilton received the Presidential Medal of Freedom, the highest civilian award in the United States, from President Barack Obama in 2016.