What is driver? Definition: A driver is a small piece of software that tells the operating system and other software how to communicate with a piece of hardware. 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. Definition: Computers use particular kinds of file systems to store and organize data on media, such as a hard drive, the CDs, DVDs, and BDs in an optical drive or on a flash drive. Any place that a PC stores data is employing the use of some type of file system. A file system can be thought of as an index or database containing the physical location of every piece of data on a hard drive. A file system is setup on a drive during a format. See How To Format a Hard Drive for more information.