Sociology and politics
* Protocol (politics), a formal agreement between nation states * Protocol (diplomacy), the etiquette of diplomacy and affairs of state *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'') *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''Other uses
* ''Protocol'' (film), a 1984 comedy film * ''Protocol'' (website), a tech news website * Minutes, also known as protocols, the written record of a meetingSee also
* Proto (disambiguation) * '' The Protocols of the Elders of Zion'', a notorious antisemitic hoax that has circulated since the early 20th century {{disambiguation