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Acode name is a secret name used to refer to a name, word, project or person.Spies are often referred to by their code name to make discovery more difficult. Code names may also be used inindustrial espionage to protect secrets from business rivals.
Secrecy is not the only reason for their use. Standard words and phrases are easier to hear on radio channels likewalkie-talkies.
Code names became numerous in World War II. Names likeOperation Barbarossa andOperation Overlord and theManhattan Project became famous.