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Microsoft Windows
Windows XP
Operating Systems

What other operating systems exist besides Windows?

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Wiki User
July 12, 2012 8:50PM

For personal use the big ones are Windows and Leopard for MacOS (Apple computers). There are a number of Linux flavors which exist. Another OS is ReactOS. That is a free, open source clone of Windows, though it has a long ways to go.

There's a full list of Operating Systems on Wikipedia. Search "list of current operating systems"