nullplan wrote:
At work, I have to deal a lot with an obscure operating system called OS-9. OS-9 styles itself as unixoid, but it really isn't.
If this is the
same operating system I know of by that name, it was developed in the late 1970s, and was the primary OS for the TRS-80 Color Computer (and according to that Wikipedia article, the Dragon32 as well); the '9' originally referred to the 6809 CPU which the system was initially developed for. It certainly isn't Unixoid; I would be very surprised if anyone advertised it as such, though given the nonsense which marketing departments pump out it wouldn't be impossible. It's probably closer to QNX (which, despite the name, isn't Unixoid either) than anything else I know of, and indeed it is often presented as a soft-RT OS. Beyond that, I don't know a lot about it.
I'm really quite surprised it is still in use at all, frankly. I know it was ported to the 68K some time in the 1980s (I recall reading about
a single board computer which used it along with a BIOS monitor called HUMBUG, as an alternative to another obscure OS called SK*DOS, which was presented in a series of magazine articles around 1990), but that was the last I heard of it. However, according to the Wikipedia article I linked to above, it has been ported to several other platforms, and is mostly used for RT control systems (the article mentions both silicon wafer scrubbers and traffic light control systems).