

Just adding to this, Linux is pretty ubiquitous these days, with it being found running billboards, menus, information screens, and many machines and appliances.
Though these versions are stripped down and no what you are used to from a desktop. They just have the kernel and a few services for the task at hand.
I have to contend with 70-80 year olds doing 30km in an 80 while swerving across the midline because they saw a bird across the street.