Ring 0

Ring 0 or zero ring or variation, may refer to:

Arts and entertainment

• ', a Japanese horror prequel film
• ', a subsequent manga

Technology

• Ring 0 (computer security), the highest privilege level
• Telephone dialling instructions to access a switchboard operator

Other uses

• Zero ring, the trivial ring in mathematics ring theory
• O̊, the letter "O" with a ring diacritical mark

See also

• Birthday (short story collection), a Japanese anthology containing prequels and sequels to Ring
• Ring road (disambiguation)
• Ring (disambiguation)