New answers tagged software
4
Filo has covered operating systems, so I won't repeat that here (except to reference this answer about New Horizons' OS, which is Nucleus RTOS rather than VxWorks, by way of a change).
As for programming languages, there's inevitably a lot of C and C++, though there's a chance that a somewhat restricted subset of the languages is used to improve safety, ...
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Example 1 : RTEMS, source https://devel.rtems.org/wiki/TBR/Website/Wheres_RTEMS
Example 2: VxWorks, source: https://en.wikipedia.org/wiki/VxWorks#Aerospace_and_defense
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