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.
A format for displaying and storing OpenType fonts. It can be scaled without losing font quality. Today the OTF library has more than 10 thousand fonts. Practically all fonts known today have an OpenType version. The format was based on Postscript and supports Unicode. It was initially developed by Microsoft, but today it belongs to Adobe.