What is an operating system?
An operating system is a program that controls the normal functions of your computer. There are two mainstream operating systems today - Windows and MacOS.
There are different versions of both operating systems, and it is important to determine which one you have before we can assist you.
If you have a Macintosh, go to the Finder (or click on the desktop in OS X). Select the Apple Menu, and choose About This Macintosh or About This Computer. The operating system version your computer is running will be displayed on the window that pops up. Mac OS X versions include 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5.
If you have a PC, chances are you are running some form of Windows. If your computer starts up with a splash screen that says "Windows Vista" and have a round Start Button, then you are running Windows Vista. Other versions of Windows, identified by their splash screens, include Windows 98, Windows NT, Windows 2000, Windows Me, and Windows XP.
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Current Record: 245
Create Date: 12-06-1996
Last Reviewed: 03-17-2009
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