driver: n. 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.
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