This format was developed to simplify use of Type1-fonts in some software. It’s 8-bit and so it’s quickly processed by programs and it has a compact structure. PFB contains additional metadata. Besides the storage of system fonts, a good example of its use is its application in AutoCAD to create font files with compilation.
This is a format for storing raster images, developed by the Ulead Company. It can include several edible layers, like in a Photoshop document. The image raster format was transferred to the TrueType font system and allows for the presentation of graphical information in a text format.