Modern operating systems use a graphical user interface, or GUI. A GUI allows one to use the mouse to click icons, buttons, and menus, and everything will be displayed on the screen in combination of graphics and text. Traditionally, computers had a command-line interface, which meant users had to type every single command to the computer and the computer would only display text. (Anonymous, 2010)
I. Mac OS X.It was created by Apple and it comes preloaded on all new Macintosh computers, or Macs. All of the recent versions are known as OS X .and the specific versions include .Yosemite 2014, Mavericks 2013, Mountain Lion 2012, Lion .2011 and Snow .Leopard 2009. Apple also offers a version called Mac OS X Server, which is designed to be run on servers. (Anonymous, 2010)
II. Microsoft Windows. Microsoft created the Windows operating system in the mid-1980s.The different versions of Windows are .Windows 8 (2012), Windows 7 .(2009), and Windows Vista .(2007). Windows comes preloaded .on most new PCs, which helps to make it the most popular operating system in the world. (Anonymous, 2010)
III. Linux. This OS can be modified and distributed by anyone around the world. This is different from proprietary software .like Windows, which can only be modified by the company that owns it (Microsoft). The most popular versions include Ubuntu, Mint, and Fedora. (Anonymous, 2010)
Normally, the operating systems of mobile phones are designed specifically for mobile devices. Operating systems for these mobile devices are usually not fully featured like those of desktop and laptop computers. However, one can still do a lot of things with them, like watching movies, browsing the Web, managing your calendar and playing games. Examples of these mobile operating systems include Apple iOS, Windows Phone, and Google Android.