Fonts, when part of a program, were stored in a &quot;FONT&quot; fork (conversely, icons went into &quot;ICON&quot;). It&#x27;s natural that font files would have nothing in the data fork and the font definition itself would be under FONT.<p>Full documentation is available at <a href="https:&#x2F;&#x2F;developer.apple.com&#x2F;legacy&#x2F;library&#x2F;documentation&#x2F;mac&#x2F;pdf&#x2F;ResEditReference.pdf" rel="nofollow">https:&#x2F;&#x2F;developer.apple.com&#x2F;legacy&#x2F;library&#x2F;documentation&#x2F;mac...</a>