CJK TrueType fonts was added in PostScript version 2015. The most common vector file format is Adobe's EPS (Encapsulated PostScript) file format. PostScript or RTF version of its syntax highlighting. It also supports several font formats, including PostScript, TrueType, and OpenType. An OpenType font with PostScript outlines must have an .otf extension. Examples are PostScript, PDF and PCL. An EPS file is a stream of generic PostScript printing commands. Letraset thus began releasing many fonts in formats such as PostScript. Traditional TeX will output a DVI file, which is usually converted to a PostScript file. Ascii85 is used in PostScript and PDF formats. This is the standard character set in most PostScript Type 1 fonts from Adobe. IBM made Courier freely available in Postscript Type 1 format. There are several tools for converting Metafont programs to PostScript Type 1 fonts. Often, the PostScript-like PDF code is generated from a source PostScript file. Adobe Systems PostScript was based on Interpress.