Apple LaserWriter 12/640 PS - Manual (Page 306)

Common questions about fonts
Here are some questions that often come up about fonts.
What kind of fonts should I buy?
Bitmapped fonts are best for screen display but don’t look as good when you
print them. PostScript fonts look great on paper if you have a PostScript
printer or Adobe Type Manager.
TrueType fonts are the best all-purpose fonts to use for your monitor and
non-PostScript printers.
Why don’t all of my fonts appear in the Fonts menu?
You may not have all of your fonts placed correctly. In system software
versions 7.1 and 7.5, all the fonts should be installed in the Fonts folder in the
System Folder.
Additionally, some application programs let the user decide which fonts
should appear in the Fonts menu. Check the manuals that came with your
programs.
Why can’t I see my Monaco 9, Geneva 9 and 12, and Chicago 12 bitmapped fonts?
These fonts are used by your computer to display information. Because the
Mac OS needs these fonts, the Finder makes them invisible to prevent users
from removing them.
307 Using Fonts With the Printer