There are two different font formats - which one should I choose?
The choice of font format is mostly based on the kind of documents you create and your computer environment. Here are some general guidelines:
TrueType is the default font format of both Macintosh and Windows systems. For that reason TrueType is popular among home users, schools and businesses. If you don’t know much about fonts, you can’t go wrong with this format.
Graphic designers and creative professionals prefer OpenType fonts with PostScript® outlines. These fonts have a .OTF file extension.
This is a legacy font format for creative professionals that has been made obsolete by OpenType. A Type 1 font has PostScript® outlines. Unlike OpenType it is not-cross platform compatible, it not as easy to install (multiple files with a screen font and printer font) and has a limited character set.