Protocol may refer to:
Sociology and politics Protocol (politics), a formal agreement between nation states Protocol (diplomacy), the etiquette of diplomacy and affairs of state Etiquette, a code of personal behavior
Science and technology Protocol (science), a predefined written procedural method of conducting experiments Medical protocol (disambiguation)
Computing Protocol (object-oriented programming), a common means for unrelated objects to communicate with each other (sometimes also called interfaces) Communication protocol, a defined set of rules and regulations that determine how data is transmitted in telecommunications and computer networking Cryptographic protocol, a protocol for encrypting data
Music Protocol (album), by Simon Phillips Protocol (band), a British band "Protocol", a song by Gordon Lightfoot from the album Summertime Dream "Protocol", a song by the Vamps from their 2020 album Cherry Blossom Protocol Recordings, a record label owned by Nicky Romero
Other uses Protocol (film), a 1984 comedy film Protocol (website), a tech news website Minutes, also known as protocols, the written record of a meeting
See also Proto (disambiguation) The Protocols of the Elders of Zion, a notorious antisemitic hoax that has circulated since the early 20th century