Missing LINUX soooooooo much

every day i miss you more and more
to work in such stable environment

lets talk about LINUX as an operating system in individual posts

LINUX history will be the start:
do any one knows what was the first operating system ever appeared in the world?
which is first DOS or LINUX?
who developed it?
when?
why?

what is open source ?
does it mean it is free or open?

do any one knows who is Richard Stallman ?

am sure that there are people who knows what am talking about and others don't for those who don't know i will post

and for those who knows please give a hand to post better