Margaret Heafield Hamilton (born August 17, 1936) is a computer scientist, systems engineer, and business owner. She was Director of the Software Engineering Division of the MIT Instrumentation Laboratory, which developed on-board flight software for the Apollo space program.
Hamilton's team's work prevented an abort of the Apollo 11 moon landing. (NASA honors Apollo Engineers)
Hamilton's work prevented an abort of the Apollo 11 Moon landing: Three minutes before the Lunar lander reached the Moon's surface, several computer alarms were triggered. The computer was overloaded with incoming data, because the rendezvous radar system (not necessary for landing) updated an involuntary counter in the computer, which stole cycles from the computer. Due to its robust architecture, the computer was able to keep running; the Apollo onboard flight software was developed using an asynchronous executive so that higher priority jobs (important for landing) could interrupt lower priority jobs. The fault was attributed to a faulty checklist and the radar being erroneously activated by the crew.
In 1986, she became the founder and CEO of Hamilton Technologies, Inc. in Cambridge, Massachusetts. The company was developed around the Universal Systems Language based on her paradigm of Development Before the Fact (DBTF) for systems and software design.
Hamilton has published over 130 papers, proceedings, and reports concerned with the 60 projects and six major programs in which she has been involved.
Left: Margaret Hamilton
Above: Earth Rise from moon as captured by Apollo Mission
Right: Hamilton with the computer code she hand typed for the Apollo Mission