What is a DVI driver?
A DVI driver is a program that takes as input a DVI file
(DVI files) and
(usually) produces a file that can be sent to a typographic
output device (which we will call a printer, for short), or to another
format.
A driver will usually be specific to a particular printer,
although any PostScript printer ought to be able to print
the output from a PostScript driver.
As well as the DVI file, the driver also needs font information.
Font information may be held as bitmaps or as outlines, or simply as a
set of pointers into the fonts that the printer itself ‘has’.
Each driver will expect the font information in
a particular form. For more information on the forms of fonts,
see PK files,
TFM files,
virtual fonts
and Using PostScript fonts with TeX.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=driver