TrueType is a digital font file format created by Apple in the 1990s, used for fonts installed on Mac OS and Microsoft Windows systems. It was developed a few years after the Postscript format was introduced by Adobe. TrueType is based on quadratic curves that are processed, calculated and rendered faster than the cubic curves used by Postscript format. Unlike Postscript fonts, which require the installation of every file one font may contain, installing a single TrueType font is enough to be able to use it.