Fun fact: the code which took Apollo 11 to the moon is available on github https://github.com/chrislgarry/Apollo-11/blob/master/Luminary099/LUNAR_LANDING_GUIDANCE_EQUATIONS.agc#L179
And if you look through it you'll see that - joyfully - it also includes original comments.
My absolute favourite thing about the Moon Code is that it includes comments like this: "TEMPORARY - I HOPE HOPE HOPE"