filename extension. In classic Mac OS and macOS, TTC has file type ttcf. Suitcase The suitcase format for TrueType is used on classic Mac OS and macOS. It adds additional Apple-specific information. Like TTC, it can handle multiple fonts within a single file. But unlike TTC, those fonts need not be within the same family. Suitcases come in resource-fork and data-fork formats. The resource-fork version was the original suitcase format. Data-fork-only suitcases, which place the resource fork contents into the data fork, were first supported in macOS. A suitcase packed into the data-fork-only format has the extension dfont. PostScript In the PostScript language, TrueType outlines are handled with a PostScript wrapper as Type 42 for name-keyed or Type 11 for CID-keyed fonts. See also ClearType Datafork TrueType Embedded TrueType font Open-source Unicode typefaces GNU FreeFont Graphite (SIL) FreeType Nonzero-rule Online office suite OpenType Pango (Open source multilingual text rendering engine) Typography Typeface Unicode, UTF-8, Unicode fonts. Uniscribe (Windows multilingual text rendering engine) Apple Type Services for Unicode Imaging (New Macintosh multilingual text rendering engine) Core Text WorldScript (Old Macintosh multilingual text rendering engine) Web Open Font Format References External links TrueType specification (Apple) Typesetting Digital typography Font formats