AGC was digital computer for navigation and control of Apollo-11 spacecraft. It’s processor was made with discrete IC logic and 16-bit word running at 2 Mhz with 2K words of RAM and 36K words of ROM.
Recently the code which runs on AGC was published on GitHub based on manual re-entering of scanned papers. The sources are dated from April 1st 1969.
The retro computer lovers will be able to run the code on the Virtual AGC.
Even if you do not like retro computing, there is still something to learn when you look how the source code is documented.