How does it seem like the opposite? It's POSIX.
Check out eg this paper about the OS: https://cseweb.ucsd.edu/~voelker/cse221/papers/qnx-paper92.p...
Yes it has some source-level Unix compatible app-facing interfaces, but we don't call the Steam OS/Deck a Windows-like either. (eg Windows NT was also POSIX certified)
Check out eg this paper about the OS: https://cseweb.ucsd.edu/~voelker/cse221/papers/qnx-paper92.p...
Yes it has some source-level Unix compatible app-facing interfaces, but we don't call the Steam OS/Deck a Windows-like either. (eg Windows NT was also POSIX certified)