Nowadays, Linux is a thoroughly modern and capable operating system, considered cutting edge by many. It also runs on many different types of computer hardware, including Apple Macintosh computers, Sun SPARC machines, and the humble desktop PC. One of the ironies is that, although Linux was based on Unix, it has slowly come to dominate the computer operating system market. According to industry sources, Linux is on its way to making commercial varieties of Unix redundant. Companies that sell their own versions of Unix, such as Hewlett Packard and IBM, have added Linux to their traditional product range.
Recent innovations in the latest versions of the kernel mean that it finds uses on the smallest computers in the world, as well as on the biggest. Several of the top supercomputers in the world run Linux and, ironically, it can also be used on handheld PDAs or even digital watches! You'll even find it running things like digital video recorders or other household goods, where it sits invisibly in the background and makes everything work. Remember that one of the fundamental principles of Linux is that you can use it for whatever you want. You don't need to ask for permission first or tell anyone what you're doing.
Linux initially found mainstream use by software developers, and on server computers, such as those that run the Internet. However, in recent years, it has become increasingly popular on desktop computers. This is the area where experts suggest it will see massive growth over the coming years.