50 years ago:
UX with "verbs and nouns",
source code in custom assembly,
direct communication with hardware
excellent explanation of source code:
1969 Moon Landing: The Code of the Apollo 11 Guidance Computer (AGC) | Pluralsight
actual source code:
chrislgarry/Apollo-11: Original Apollo 11 Guidance Computer (AGC) source code for the command and lunar modules. @GitHub
Apollo 11 Mission Overview | NASA
Apollo 11 - Wikipedia
50 Years Ago, Apollo 11 Launched to the Moon: A Look Back at the Epic Day | Space
Apollo 11 Turns 50: A Complete Guide to the Historic Moon Mission | Space
Apollo 11 Command Module Columbia | Smithsonian Institution
Online Apollo Guidance Computer Simulator
Functional DSKY with Apollo Guidance Computer, runs all NASA/MIT Code | eBay