«The Eagle has landed…»
Here’s a challenge…
Develop a system that can control a 13,000 kg spaceship, orbiting at 3,500 kilometres per hour around the moon, land it safely within metres of a specified location and guide it back from the surface to rendezvous with a command ship in lunar orbit. The system has to work the first time, and minimise fuel consumption because the spacecraft only contains enough fuel for one landing attempt.
Do this with a computer that has barely 5,000 primitive integrated circuits, weighs 30 kg and costs over $150,000. In order to store your software, the computer doesn’t have a disk drive, only 74 kilobytes of memory that has been literally hard-wired, and all of 4 Kb of something that is sort of like RAM:
Sounds daunting?
That’s the task that faced Peter Adler and Don Eyles of the MIT Instrumentation Lab who were responsible for developing the software for the Apollo Lunar Module. Their system worked, but almost caused the first moon landing to be aborted in the final minutes before the touchdown.
Les historien om The Lunar Module Computer, den første computer med integrated circuits her.

The colour photograph of Earthrise – taken by Apollo 8 astronaut, William A. Anders, December 24, 1968. Although the photograph is usually mounted with the moon below the earth, this is how Anders saw it. https://www.abc.net.au/science/moon/earthrise.htm