What is ttf, otf?
TrueType is an outline font standard originally developed by Apple Computer in the late 1980s as a competitor to Adobe’s Type 1 fonts used in PostScript. The primary strength of TrueType was originally that it offered font developers a high degree of control over precisely how their fonts are displayed, right down to particular pixels, at various font heights. OpenType is a scalable computer font format initially developed by Microsoft, later joined by Adobe Systems. OpenType was first announced in 1996, with a significant number of OpenType fonts starting to ship in 2000–2001. Adobe completed conversion of its entire font library to OpenType around the end of 2002. As of early 2005, there were around 10,000 fonts available in OpenType format, with Adobe’s library making up under a third of the total. As of 2006, every major font foundry and many minor ones were developing fonts in OpenType format.
