A computer engineer has tracked down the first Apollo guidance computer
I would argue it was  <i>first</i> space flight guidance computer.<p>Technically nazis V1 had analog guidance computer and traveled in space. The same with all later ballistic missiles etc.<p>Early soviet manned space flights (Vostok, Voschod) were fully automated, in case pilot passes out. Americans did not  had that until Apollo.<p>There was even 'password' login :-) [wiki, Vostok 1]<p>> <i>The entire mission would be controlled by either automatic systems or by ground control. This was because medical staff and spacecraft engineers were unsure how a human might react to weightlessness, and therefore it was decided to lock the pilot's manual controls. In an unusual move, a code to unlock the controls was placed in an onboard envelope, for Gagarin's use in case of emergency.[7]:278 Prior to the flight, Kamanin and others told Gagarin the code anyway.</i>