See also ... systemd, a suite of system components for Linux, whose name is inspired by System D.
> Because it's a system daemon, and under Unix/Linux those are in lower case, and get suffixed with a lower case d. And since systemd manages the system, it's called systemd.
> Système D is not an acceptable spelling and something completely different (though kinda fitting).
Wikipedia says that it somehow relates to Systeme D, but they don't have any good references for it.