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Computer operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the storage drives, and controlling peripheral devices, such as printers.
For large systems, the operating system has even greater responsibilities and powers. The application programs must be written to run on top of a particular operating system.
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The commands are accepted and executed by a part of the operating system called the command processor or command line interpreter.
Graphical user interfaces allow you to enter commands by pointing and clicking at objects that appear on the screen.There's the trusty computer mouse, which you can move anywhere on the screen, summoning up your music library or Internet browser at the slightest whim.Although it's easy to feel like a director in front of your desktop or laptop, there's a lot going on inside, and the real man behind the curtain handling the necessary tasks is the operating system.More recently, operating systems have started to pop up in smaller computers as well.If you like to tinker with electronic devices, you're probably pleased that operating systems can now be found on many of the devices we use every day, from cell phones to wireless access points.Over 100 state-of-the-art training centers throughout the U. and Canada provides members the skills to build, operate and maintain the essential infrastructure of both countries.