Margaret Hamilton, a profoundly influential computer scientist best known for leading the software engineering team at MIT's Instrumentation Lab during NASA's Apollo program, died on Sep. 30. She was 90. A computing pioneer who authored over 130 publications, Hamilton helped to establish software engineering as a dedicated discipline. She worked at MIT from 1959 until the mid-1970s, after which she became a successful computing entrepreneur and CEO.

You probably know her from the photo of her standing next to the stack of books containing the Apollo guidance software she and her MIT team wrote.