IBM AP-101 general-purpose computer [pdf] (gandalfddi.z19.web.core.windows.net)

Ken Shirrif recently published a survey of the "system/4 pi" family of which this is a member:

https://www.righto.com/2026/03/ibm-4-pi-computer-history.htm...

Also some information on HAL/S, the language used to program the shuttle's guidance computer: https://ntrs.nasa.gov/api/citations/19790006637/downloads/19...

Did a quick lookup on Orion and apparently today the Artemis programme is using C with MISRA-like internal standards.