In the 1980's the backup flight control software for landing the space shuttle ran on a HP-41 calculator, though they never had to use it AFAIK, with the multiple redundant onboard computers.
They weren't connected to other shuttle computers, were they?
https://airandspace.si.edu/collection-objects/calculator-han...
I remembered reading it in the newspapers at the time which would have probably make the reports generally pre internet (or pre newspapers on the internet) in the 1980's. Of course I could be remembering it wrong or it could have been a HP calculator ad.