Font Files

Font files contain one or more fonts that can be accessed by the operating system and applications.

Most modern fonts are stored in either the OpenType or TrueType formats, which can be used by both Macintosh and Windows computers.

The most used font file formats are:

- Adobe Type 1 (PFB file extension) and Type 3 fonts developed by Adobe for professional digital typesetting and desktop publishing. 

- TrueType font (TTF file extension) is file format created by Apple, Inc as competition for Adobe Type 1 fonts. TrueType font is described by quadratic Bezier curves. It is a very popular font format, that is supported by many operating systems (Microsoft Windows, MAC OS X, Linux).

- OpenType (OTF file extension) is a current standard font file format supported by modern operating systems that was designed by Microsoft and Adobe. OpentType fonts are based on Adobe Type 1 font and contain wide range of metadata and international/foreign character sets.

File Extension	File Type
.ABF	Adobe Binary Screen Font File
.ACFM	Adobe Composite Font Metrics File
.AFM	Adobe Font Metrics File
.AMFM	Adobe Multiple Font Metrics File
.BDF	Glyph Bitmap Distribution Format
.CHA	Character Layout File
.CHR	Borland Character Set File
.COMPOSITEFONT	Windows Composite Font File
.DFONT	Mac OS X Data Fork Font
.EOT	Embedded OpenType Font
.ETX	TeX Font Encoding File
.EUF	Private Character Editor File
.F3F	Crazy Machines Font File
.FFIL	Mac Font Suitcase
.FNT	Windows Font File
.FON	Generic Font File
.FOT	Font Resource File
.GDR	Symbian OS Font File
.GF	METAFONT Bitmap File
.GXF	General CADD Pro Font File
.MCF	Watchtower Library Font File
.MF	METAFONT File
.MXF	Maxis Font File
.NFTR	Nintendo DS Font Type File
.ODTTF	Obfuscated OpenType Font
.OTF	OpenType Font
.PCF	PaintCAD Font
.PFA	Printer Font ASCII File
.PFB	Printer Font Binary File
.PFM	Printer Font Metrics File
.PFR	Portable Font Resource File
.PK	Packed METAFONT File
.PMT	PageMaker Template File
.SFD	Spline Font Database File
.SFP	Soft Font Printer File
.SUIT	Macintosh Font Suitcase
.T65	PageMaker Template File
.TFM	TeX Font Metric File
.TTC	TrueType Font Collection
.TTE	Private Character Editor File
.TTF	TrueType Font
.TXF	Celestia Font Texture File
.VFB	FontLab Studio Font File
.VLW	Processing Font File
.VNF	Vision Numeric Font
.WOFF	Web Open Font Format File
.XFN	Ventura Printer Font
.XFT	ChiWriter Printer Font
.YTF	Google Picasa Font Cache