Adobe Font Metrics refers to the format that is used for a variety of applications, particularly for digital typesetting. This is considered as one of the PostScript fonts, which are outline font specifications, that are created by Adobe Systems Inc.The file extension name is .afm, which is an obvious abbreviation of Adobe Font Metrics, that is primarily consisted of font metrics information and general font information. It provides global metrics for a font application, while metrics for each and every individual character. All metrics of any base font program is described by a single AFM file. This particular type of file format is only used in UNIX programming environments, which is a Linux tool that can be both installed in Windows and Mac computers. Generally, there are three major kinds of font types that are supported by PostScript language, namely normal Type 1, multiple master, which is a Type 1 extension, and Type 0 or also referred to as composite fonts.