GNR Class D2, a class of British steam locomotives PRR D2, an 1868 American steam locomotive model Ships HMS Attacker (D02), a 1941 American-built escort aircraft carrier HMS Devonshire (D02), a 1962 County-class destroyer HMS Inglefield (D02), a 1936 I-class destroyer and flotilla leader of the British Royal Navy , a 1909 American submarine Other vehicles Char D2, a French tank Electronics Cowon D2, a 2007 portable media player with touch screen interface Datasaab D2, a Swedish concept computer completed in 1960 d2, a brand of computer peripherals manufactured by the French firm électronique d2, now trading as LaCie D2 kit, a microprocessor development kit MEK6800D2 D-2 (video), a professional digital video format DOCSIS 2, a cable modem standard Other uses D2, the Codex Claromontanus, a 6th-century Greek-Latin uncial manuscript of the New Testament D2, a dihedral group in group theory D2, deuterium, an isotope of hydrogen D2, an almond-shaped cloud on Neptune D2, the code for permission to use specific land or premises for leisure (cinemas, swimming baths, gymnasiums) in town and country planning in the United Kingdom Division II (disambiguation), in sports leagues, etc. Marcelo D2 (born 1967), Brazilian rapper D2, an abbreviation for DOCSIS 2.0, an international telecommunications standard D2 steel, a type of D-Grade tool steel with good wear resistance commonly found in shears and high end knives D2, gaming notation for a 2-sided die, such as a coin D2, a standard paper size between B2 and A1 D2 Subway, a planned Dallas, Texas light rail tunnel See also 2D (disambiguation) DII (disambiguation)