With these words, an unknown hacker named Linus Torvalds released Linux into the world, 20 years ago this year. PS. ... It is NOT protable (uses 386 task switching etc), and it probably never will support anything other than AT-harddisks, as that's all I have :-(.
Today Linux is the most portable kernel in the world, running on everything from phones to TVs to routers. And of course when coupled with the GNU set of tools and utilities forms an operating system of unrivaled power and freedom.