A local chain whose computer rebooted showed it to be using IBM's OS for POS. Last copywrite was 1999. I found out that it was an customized version of Concurrent DOS.
Its history is quite amusing compared to some other OS's with better design. Last I heard was that the company's bigger stores upgraded to Fujitsu Linux (???) that runs that DOS system in an emulated or extended way. The backend is SCO Linux and mainframes. The self-checkouts, per the techs, run on Windows Embedded for GUI, the DOS thing emulated in there somehow, and a connection to backends.
It's clear they keep going out of their way with more complex designs and configurations to prevent replacing that relatively-simple DOS app. Hilarious.
https://en.wikipedia.org/wiki/Concurrent_DOS
Its history is quite amusing compared to some other OS's with better design. Last I heard was that the company's bigger stores upgraded to Fujitsu Linux (???) that runs that DOS system in an emulated or extended way. The backend is SCO Linux and mainframes. The self-checkouts, per the techs, run on Windows Embedded for GUI, the DOS thing emulated in there somehow, and a connection to backends.
It's clear they keep going out of their way with more complex designs and configurations to prevent replacing that relatively-simple DOS app. Hilarious.