protocol
n.
The rules of etiquette and ceremony that govern diplomatic relations between states.
A diplomatic document, especially a treaty or compact, signed by the negotiators but subject to ratification.
An amendment to a treaty or convention.
Procedures followed during experiments.
ComputingA standard that describes the technical processes used to exchange information, especially across a network.
DiplomaticsThe first portion of a document, containing the administrative context of the action (the persons involved, the time and place, and the subject) and the initial formulas.
Notes
Examples of protocols5 include TCP/IP, SMTP, HTTP, and FTP.