Apollo 11 AGC - Bailout

BAILOUT, WHIMPER, and POODOO — the software restart handlers from the Apollo 11 Lunar Module Guidance Computer. As Armstrong and Aldrin descended to the Moon on July 20, 1969, the computer fired the famous 1201 and 1202 program alarms — overload conditions that, on any other machine, would have meant aborting the mission. These routines quietly shed low-priority work, restarted the affected jobs, and kept the computer flying. The landing succeeded. The story of the alarms became one of the most-told moments in computing history.

Source: Luminary 099, ALARM_AND_ABORT.agc. Written by the MIT Instrumentation Laboratory under NASA contract NAS 9-4065. Public domain. Transcribed by the Virtual AGC project, ibiblio.org/apollo.