Answer:
Drivers can refer to:

1. Operators of many types of motor vehicles, usually cars, trucks, and vans.

2. Pieces of software that instruct the operating system of a computer in how to use a piece of hardware. Ex. a printer or video card.

3. A tool used to insert a screw. More accurately referred to as a "screwdriver."

In the use of computers:

Drivers are the necessary software that allow your Operating System and the device perform the function that they are needed to do. Ex a driver is needed for sound a sound card and without the driver your computer will not have sound because the operating system can not communicate with it. Drivers are optimized for certain operating systems so make sure you get the correct version.

First answer by Idisjunction. Last edit by Korsixx. Contributor trust: 3 [recommend contributor recommended]. Question popularity: 4 [recommend question].