The /usr/lib/font/devpsc directory describes the available set of
PostScript-device fonts supported in the A/UX version of troff(1).
The *.map files in that directory describe the fonts. You may also see
font(5) for the explanation. troff(1), however, does not support a
complete set of resident PostScript fonts in the LaserWriter Plus or the
LaserWriter II.
troff does have a screen previewer. You must have a 4014/4015 terminal
emulation program such as Versaterm's or X Windows'. Issue the tc(1)
command this way:
troff filename | tc