The fact that there are Type 1 and Type 3 fonts may make you wonder about Type 2. Well, they exist! There are a number of other PostScript font formats that serve very specific purposes. These formats are only used within PostScript interpreters or PostScript files so you don’t encounter them as a user of prepress software. Some of these data types include:

1. Type 0 fonts: Adobe kept all information about this font format to themselves. If they tell you all about it, they are forced to shoot you.
2. Type 2 fonts: Font format that was used to embed fonts in Acrobat 3 PDF files.
3. Type 4 and type 5 fonts: font formats that are used to store fonts on font cartridges or ROMs
4. Type 32 fonts: used for downloading some types of bitmap fonts to PostScript devices
5. Type 42 fonts: font format that is used to output TrueType fonts on a PostScript device by putting a PostScript ‘wrapper’ around the TrueType fonts. Some preflighting tools sometimes refer to ‘Type 42′ when reporting the presence of TrueType fonts in PostScript files.

You may also encounter references to CID-keyed fonts: this is a font file format that Adobe developed to optimized the font data for speed and for handling fonts with large character sets