See Type 1 font. The Mac uses more general file names; for example, a Helvetica font would have an outline file named "Helve" and a font metrics file named "Helvetica." The icon for the font ...

More than 750 of these fonts have been provided via a collaboration with Monotype, which owns the licenses for Helvetica, Gotham, and Avenir. Older versions of some of these fonts were previously ...