For example, all printers come accompanied with drivers to install that tell the operating system exactly how to print information on the page. Sound card drivers tell your software exactly how to translate data into audio signals that the card can output to a set of speakers. The same applies to video cards, keyboards, monitors, etc.
The drivers for each piece of hardware in your Windows computer are centrally managed from Device Manager, available in all versions of Microsoft Windows.
Operating System: Abbreviated as OS, it is a usually large program that controls and manages the hardware and other software on a computer.
The most popular operating systems today include versions of Microsoft Windows (like Windows 7, Windows Vista, and Windows XP), Apple's Mac OS, and flavors of the open source operating system Linux.
Hardware: in the computer world, refers to the physical components that make up a computer system. There are many different kinds of hardware that can be installed inside, and connected to the outside, of a computer.
Take a tour inside your PC to learn how all the hardware in your computer connects together to create the complete computer system you use everyday.
site: http://pcsupport.about.com
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