Font Files
==========
The `gtroff' font format is roughly a superset of the `ditroff' font
format. Unlike the `ditroff' font format, there is no associated
binary format; all files are text files. The font files for device
NAME are stored in a directory `devNAME'. There are two types of file:
a device description file called `DESC' and for each font F a font file
called `F'.