protocol >> /ˈproʊdəˌkɔl/
Definition: [noun] The official procedure or system of rules governing affairs of state or diplomatic occasions.
Example: protocol forbids the prince from making any public statement in his defense
Definition: [noun] The original draft of a diplomatic document, especially of the terms of a treaty agreed to in conference and signed by the parties.
Example: signatories to the Montreal Protocol
Definition: [noun] A formal or official record of scientific experimental observations.
Example: protocols of published cases frequently lack this vital information
Definition: [noun] A set of rules governing the exchange or transmission of data between devices.
Example: Internet mail protocols - the technical rules that govern how messages are transmitted - need revamping.