Linux is an operating system. An operating system is the basic set of programs and utilities that make your computer run. Some other common operating systems are Unix (and its variants BSD, AIX, Solaris, HP-UX, and others) DOS, Microsoft Windows, Amiga, Google Chrome and Mac OS. Linux is an ideal operating system for power-users and programmers.
Linux is a UNIX-based operating system originally developed as for Intel-compatible PC's. Linux is built and supported by a large international community of developers and users dedicated to free, open-source software. This community sees Linux as an alternative to such proprietary systems as Windows and Solaris, and as a platform for alternatives to such proprietary applications as MS Office, Internet Explorer, and Outlook.