I find I have to say this a lot online: It is an important and very common error of thinking to assume that everyone has the same experiences as you. Don't thi

I find I have to say this a lot online: It is an important and very common error of thinking to assume that everyone has the same experiences as you. Don't think "because I did X and found Y, everyone that does X must find Y." I too learned Unix on Xenix. I installed Xenix 286 on my IBM PC-AT in my first job, fitting a 2nd (15MB) HDD to do it (ST-506, 5.25" FH). I got it exchanging messages via UUCP with Xenix 386 over a serial line to a larger 386 machine that wasn't mine. This was 1988. Our office wasn't networked -- LANs were too new and too expensive. No WWW, no internet, no Google. Before Linux, before 386BSD. In my next job I took out my own personal online subscription, which I still have; that email address is now 33 years old. I learned Unix from the SCO manuals, which were excellent. I fondly remember the Permuted Index. No mention of Microsoft. Only occasionally in copyright messages, and they were everywhere and were meaningless and ignored. It would be decades later I discovered Xenix was originally an MS product. To me, it was a SCO product, and SCO were good guys. SCO != SCO Group, who now have tainted the name and most people reading "SCO" don't know the difference. But, for me, Xenix == SCO.