This is a format for presenting fonts in PDF files that was initially conceived to store symbols in the Japanese and Chinese languages because it had a 16-bit structure and allowed for more precise adjustment. CID expands the the potential for PostScript by supporting languages that do not have a left-to-right orientation, and by supporting even a vertical mode of orientation.
Type42 was based on the PostScript language for displaying TrueType fonts. It allows for printing all TrueType fonts on PostScript printers and allows for rasterization when displayed. All changes in font structure occur with PostScript procedures. It supports multibyte TrueType fonts in Chinese, Korean and Japanese.