What the Margaret Hamilton obituaries agree on
Ars Technica and The Register reported on October 8, 2026 that Margaret Hamilton died at 90. They credit her with Apollo on-board flight software. No cause is stated here.
The short version
That she died at 90, and that she led Apollo on-board flight software. Ars Technica says she died last week and received the Presidential Medal of Freedom in 2016. No cause is given.
What happened
On October 8, 2026, Ars Technica and The Register reported that Margaret Hamilton had died at 90. Ars Technica said she died last week. Its account says she led the on-board flight software for NASA's Apollo program at MIT's Instrumentation Lab, that she coined the term software engineering, and that she received the Presidential Medal of Freedom in 2016. The FreeBSD project posted a tribute dated October 7. This page does not state a cause of death, because the Ars account it is using does not. The front page filing the notices is Futureweb.
What the obituaries agree on
The Register's headline and Ars Technica's story agree on the person, the age, and the Apollo role: software that flew with the missions, including Apollo 11. Ars Technica adds a MIT quotation from Olivier de Weck, interim head of the Department of Aeronautics and Astronautics, calling her a fundamental contributor to the program. FreeBSD's October 7 newsflash is a project's tribute, not an independent reporting of the medical facts. Where the long biographical detail lives, it lives in the Ars Technica obituary, and this page attributes it there. The desk is Software.
What Ars Technica reports she built
Ars Technica reports that Hamilton was the first programmer hired for the Apollo on-board guidance software, and the first woman in that hire, and that the work covered six lunar landing missions from 1969 to 1972. It reports that during Apollo 11 the on-board computer alarmed while the lunar module descended, and that software she had argued for kept higher-priority landing tasks and dropped lower-priority ones. The quotation it prints from her 1971 letter says the software recognized an overload and recovered. That letter is her account, as the obituary reproduces it, of why the landing continued. A note on what a version number has to mean, for software that ships with one, is what a version number has to mean.
Why it matters on this desk
The dependency is the flight software, so the brief is filed once, on the software desk. The same headlines also appeared on other desks' wires because the name traveled. They are not five stories. A reader of this desk can check a dated obituary, an age, a role, and an award, and can see which sentences are Ars Technica's biography rather than a line in every headline. An earlier brief on memory safety in release notes, a different kind of software document, is memory safety in the release notes.
What this page will not expand
It will not retell the whole career as if this paper had interviewed the family. Ars Technica reports she was born in 1936 in Paoli, Indiana, graduated from Earlham College in 1958, programmed for Edward Lorenz, worked on the SAGE project, and later founded Higher Order Software and Hamilton Technologies. Those are the obituary's sentences. Survivors, as that account lists them, are her daughter Lauren Hamilton, her son-in-law, two grandsons, four great-grandchildren, and siblings John, David, and Kathryn. A license question about obligations in published code, which this death notice is not, is on Open source.
What the FreeBSD notice is
The FreeBSD newsflash dated October 7, 2026 is titled as a tribute. It confirms that a software project marked the death the day before the newspaper obituaries. It does not add a cause, a funeral, or a dispute about the Apollo record. This page cites it so the death is not a single-outlet headline. The biographical claims above stay with Ars Technica, and the age in the headline stays with The Register as well.
What to watch next
A family statement or an MIT obituary that adds a date of death or a cause would replace the phrase last week. A correction to the Medal of Freedom year or to the Apollo role would replace those sentences. Another outlet repeating the age does not. The Apollo software's later public copies are history. They are not a new event on October 8.
What would change the notice
A retraction by Ars Technica or The Register would change it. So would a primary MIT or NASA notice that contradicts the age or the role. Until then the October 8 obituaries and the October 7 FreeBSD tribute are the record. This paper is not choosing among Apollo anecdotes beyond the overload behavior Ars Technica attributes to her software and to her 1971 letter.
What stays an obituary
What stays specific is a death at 90, reported October 8, 2026, of the engineer the obituaries credit with Apollo on-board flight software and with the phrase software engineering, and a 2016 Presidential Medal of Freedom. It is not a product review. It is not a cause of death. The Register, Ars Technica, and FreeBSD agree that the notice is hers. The long biography is Ars Technica's, and it is labeled that way. The same name showed up on other desks' wires because several outlets posted at once. That repetition is one death, filed here, not a robotics story or an energy story that happens to share the headline. Ars Technica also reports the Medal of Freedom year as 2016 and quotes MIT's Olivier de Weck. Those two sentences stay with that obituary.
Sources
The reports this brief is filing. Futureweb did not republish them.
Questions
Who did Ars Technica and The Register report had died?
Margaret Hamilton, at 90. Ars Technica said she died last week, in a story published October 8, 2026. The Register's headline the same day also says she died at 90.
What Apollo role do the obituaries attribute to Margaret Hamilton?
She led development of on-board flight software for NASA's Apollo program. Ars Technica reports she was the first programmer hired for that MIT Instrumentation Lab work.
Which award does the Ars Technica obituary attach to Hamilton?
The Presidential Medal of Freedom in 2016. The same account quotes Olivier de Weck, interim head of MIT's Department of Aeronautics and Astronautics.
Did the FreeBSD project mark Hamilton's death?
Yes. The FreeBSD newsflash dated October 7, 2026 is a tribute. It is a third notice, not a second biography.
Does this page state a cause of death for Margaret Hamilton?
No. The Ars Technica obituary used here says she died last week at 90 and does not give a cause. This page does not add one.