Yellow Book— defining a transport service, roughly equivalent to layer 4 of the ISO seven-layer reference model.
Green Book— defining a terminal connection protocol.
Blue Book— defining a file transfer protocol.
Grey Book— defining an electronic mail service.
Red Book— defining a job transfer and submission protocol.
Pink Book— defining a transport service to run over an ISO OSI CSMA/CD service.
Orange Book— defining a network service running over a Cambridge Ring.
Colors have been used to identify various other standards, including CD-ROM format standards.
"coloured book." A Dictionary of Computing. . Encyclopedia.com. (August 17, 2018). http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/coloured-book
"coloured book." A Dictionary of Computing. . Retrieved August 17, 2018 from Encyclopedia.com: http://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/coloured-book