Operating systems are core software that manage hardware and system resources and run apps. They coordinate memory, files, devices, security, and provide a user interface.
Microsoft isn't evil, they just make really crappy operating systems. Linus Torvalds
UNIX does not allow path names to be prefixed by a drive name or number; that would be precisely the kind of device dependence that operating systems ought to eliminate. Andrew S. Tanenbaum
It is the fate of operating systems to become free. Neal Stephenson
In my opinion MS is a lot better at making money than it is at making good operating systems. Linus Torvalds
Operating systems are like underwear - nobody really wants to look at them. Bill Joy
Identical twins are ideal lab specimens for studying the difference between learned and inherited traits since they come from the womb preloaded with matching genetic operating systems. Any meaningful differences in their behaviors or personalities are thus likely to have been acquired, not innate. Jeffrey Kluger