81 may refer to: 81 (number), the natural number following 80 and preceding 82 one of the years 81 BC, AD 81, 1981, 2081 The international calling code for Japan Nickname for the Hells Angels Motorcycle Club. "H" is the eighth letter of the alphabet, and "A" is the first. 81 Terpsichore, a main-belt asteroid 81 mm mortar, a military indirect fire weapon
See also
81st (disambiguation) List of highways numbered 81 Tatra 81, a heavy-duty truck