Driver

[Nemroktany 0]

a part that transmits motion to another part by contact with it, or through an intermediate relatively movable part, as a gear which drives another, or a lever which moves another through a link, etc. Specifically:

[Hina Muqadas]

the driving wheel of a locomotive

[EdwardyHuche]

a crossbar on a grinding mill spindle to drive the upper stone

[Merna]

1. The main loop of an event-processing
   program; the code that gets commands and dispatches them for execution.
   2. [techspeak] In device
   driver, code designed to handle a particular peripheral device
   such as a magnetic disk or tape unit. 3. In the TeX world and the computerized typesetting world in
   general, a program that translates some device-independent or other common
   format to something a real device can actually understand.

[Mark Zuckerberg]

A large sail formerly used with the wind aft or quartering. It
was a square sail cut like a studding-sail, and set with a great yard on
the end of the spanker-boom, across the taffrail. The name latterly has
been officially applied to the spanker, both being the aftermost sails
of a ship, the ring-tail being only an addition, as a studding or
steering sail. (See STEERING-SAIL.) Also, the foremost spur in the
bilge-ways, the heel of which is fayed to the fore-side of the foremost
poppet, and the sides of it look fore and aft. Also, a sort of
fishing-boat.

[Couch Potatoe]

(computer science) a program that determines how a computer will communicate with a peripheral device

[sastergri]

a kind of sail, smaller than a fore and aft spanker on a square-rigged ship, a driver is tied to the same spars.

[Lanell]

the person who drives beasts or a carriage; a coachman; a charioteer, etc.; hence, also, one who controls the movements of a locomotive

[Carmellabita]

an attachment to a lathe, spindle, or face plate to turn a carrier

[PussyCat]

the after sail in a ship or bark, being a fore-and-aft sail attached to a gaff; a spanker

[Luis Fok]

One who drives something, in any sense of the verb to drive.