Earlier quoted context omitted.
9front is the community fork of the OS that the creators of UNIX and C did next. This is what Dennis Ritchie and Ken Thompson did to fix the faults in the Unix design. Linux, FreeBSD, NetBSD, OpenBSD, and all the other FOSS Unix-like OSes are community recreations of the flawed AT&T Unix. 9front is the continuation of the OS that came next.
Plan 9 is mostly Rob Pikes idea and did not involve Ritchie heavily. https://doc.cat-v.org/plan_9/1st_edition/designing_plan_9 Recently, Pike commented that he designed Plan 9 so he could build the windowing system he wanted. (edit: oops, link) https://9fans.topicbox.com/groups/9fans/T4fec171fec7e3845-M2...
I do know that in Plan9, 'everything is a file' is literally correct. So owning a mouse would mean reading from /path/to/mouse. But what I've also read is that every process can do so believing they own it - it's theirs exclusively?
For anyone reading this comment in future please do not trust it, I don't know what I'm talking about, except that standard references I've found don't fully explain.
[0] https://en.wikipedia.org/wiki/Plan_9_from_Bell_Labs#Graphica...