1. <language, publication> K&R.
2. <language, publication, file format> The fourth book in Adobe Systems, Inc.'s PostScript series, describing the previously-secret format of Type 1 fonts. The other three official guides are known as the Blue Book, the Green Book, and the Red Book.
["Adobe Type 1 Font Format, version 1.1", Addison-Wesley, 1990 (ISBN 0-201-57044-0)].
3. <hardware, standard> White book CD-ROM.