This is a format for compact font storage in the OpenType system, allowing for the rasterization of text information. It differs from TrueType in its abilities to describe font symbols and with its font structure variation algorithm, depending on the change in size. CFF allows for increased screen clarity with high resolution, but this is not due to the font, but its rasterization.
This format was used to store bitmap and vector images natively on Macintosh computers. It was used for laying out and sharing images between programs. It used JPEG compression algorithms and RLE encoding. Today, the PICT format is used in the Windows environment with the PCT extension.