Comparing oh to other Unix shells

[Ioannis Nompelis]

I looked up the copyrights and it is IEEE _and_ the Open Group. Cna you go
search in the IEEE-type online shops? I did not really look, but this was a
quick link: https://www.techstreet.com/ieee/pages/home
Will cost much less than 4 bound, custom books here.

The same page says that "UNIX is a registered trademark of the Open Group"
which is something I did not knnw!
http://pubs.opengroup.org/onlinepubs/9699919799/