Today

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Today

  1. 1. TodayCommand line interface (or CLI) operating systems can operate using only the keyboard forinput. Modern OSs use a mouse for input with a graphical user interface (GUI) sometimesimplemented as a shell. The appropriate OS may depend on the hardware architecture,specificallythe CPU, with only Linux and BSD running on almost any CPU. Windows NT has beenported toother CPUs, most notably the Alpha, but not many. Since the early 1990s the choice forpersonalcomputers has been largely limited to the Microsoft Windows family and the Unix-like family,ofwhich Linux and Mac OS X are becoming the major choices. Mainframe computers andembeddedsystems use a variety of different operating systems, many with no direct connection toWindows orUnix, but typically more similar to Unix than Windows.• Personal computerso IBM PC compatible - Microsoft Windows and smaller Unix-variants (like Linux andBSD)o Apple Macintosh - Mac OS X, Windows, Linux and BSD• Mainframes - A number of unique OSs, sometimes Linux and other Unix variants.• Embedded systems - a variety of dedicated OSs, and limited versions of Linux or other OSs

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