Recent versions of Mac OS can use the same TrueType/OpenType font files as Windows. An OpenType font file has a '.otf' extension if it has PostScript CFF outlines and a '.ttf' extension if it has TrueType style outlines. A TrueType font file has a '.ttf' extension. Windows requires only one file for each font. Legacy PostScript font outlines (cubic curves) can be used without inexact conversions to TrueType outlines (quadratic curves). It also bridges the gap between TrueType and PostScript fonts by supporting PostScript style outlines ( CFF). The OpenType font format is an extension of the TrueType format and was created to add advanced typography features. It is most useful for languages with large character sets like Chinese or Japanese that may use the same glyphs for different fonts. The TrueType collection (.ttc) is a space saving modification of the TrueType format containing multiple TrueType/OpenType fonts that share glyphs. It can also contain information specific to each platform it supports (encoding tables, names in different languages, etc.). All the information (outlines, kerning, widths, etc.) related to a TrueType font is contained in one file. Each table contains a specific type of information for a font. TrueType fonts are made up of separate structures of information called tables. The TrueType font format has been supported internally on both Mac and Windows operating systems for some time now. The benefit of representing shapes this way is that they can be scaled to virtually any size and still retain smooth edges (unlike bitmap fonts which exhibit jagged edges and other artifacts when enlarged or shrunken). They contain instructions for building outlines from scalable lines and curves which are filled to create the solid shapes of letters and other glyphs. PostScript Type 1, TrueType and OpenType fonts are vector outline fonts. Mac and Windows PC Fonts Mac and Windows PC Fonts

Format for mac and pc