J2

J2, J.II or J-2 may refer to:

Codes and classifications

 * J2, the IATA airline designator for Azerbaijan Airlines
 * J-2 visa, a nonimmigrant visa issued by the United States for spouses and dependents of J-1 visa exchange visitors
 * ATC code J02, a subgroup of the Anatomical Therapeutic Chemical Classification System
 * Haplogroup J2 (Y-DNA), a Y-DNA haplogroup
 * Janko group J2 in mathematics
 * Jinja2, a Python template engine that uses file extension
 * $$J_2 \,$$, a celestial body's second dynamic form factor in the nodal precession
 * $$J_2 \,$$, the second invariant of the deviatoric stress tensor

People and organizations

 * j2 Global Communications, a tech company best known for electronic fax services
 * J2 (music channel), a former New Zealand music TV Channel
 * TVB J2, former names of TVB Plus, a digital TV channel of Television Broadcasts Limited
 * J. League Division 2, the second-tier of Japanese professional association football
 * Jefatura de Inteligencia del Estado Mayor Conjunto de las Fuerzas Armadas (J-2), an Argentine intelligence agency
 * J2, the Intelligence Directorate of the United States Joint Chiefs of Staff
 * Director of Military Intelligence, the head of Irish Defence Forces intelligence, sometimes referred to as J2

Vehicles

 * Rocketdyne J-2, a rocket engine used in the Saturn rockets and intended for use on the Space Launch System
 * AEG J.II, a World War I German ground attack aircraft
 * Albatros J.II, a World War I German single-engine, single-seat, biplane ground-attack aircraft
 * Allard J2, any of several postwar American market-designed English cars
 * Auster J-2 Arrow, a 1945 British single-engined two-seat high-wing touring monoplane
 * HMAS J2, an Australian submarine
 * JAC J2, a city car produced by JAC Motors
 * Junkers J 2, a 1916 all-metal German fighter prototype aircraft
 * LB&SCR J2 class, a British LB&SCR locomotive
 * McCulloch J-2, a 1962 small, two-seat autogyro
 * MG J-type, a 2-seat sports car produced by the MG Car company from 1932 to 1934
 * Morris Commercial J2 small forward-control van produced from 1956 to 1967
 * Taylor J-2, a 1935 American two-seat light aircraft
 * Mikoyan-Gurevich MiG-15, an aircraft called J-2 in China

Other uses

 * J2, a comicbook character, son of Juggernaut
 * The Skyly J2, a fictional combat aircraft in the Sky Crawlers book series
 * J2, a killer whale also known as Granny
 * J2 League, Japanese football league
 * County Route J2 (California)
 * J2, a duo music project consisting of brothers Johnny and Justin Coppolino
 * S/2003 J 2, a retrograde irregular satellite of Jupiter
 * Hell Cat, a roller coaster formerly named J2 at Clementon Amusement Park
 * J2, Jared Padalecki and Jensen Ackles, stars of the TV series Supernatural
 * Johnson solid J2, the equilateral pentagonal pyramid
 * Rocketdyne J-2, a cryogenic rocket engine used on the second and third stages of the Saturn V Moon rocket
 * Samsung Galaxy J2, an Android smartphone
 * Samsung Galaxy J2 Prime, a successor smartphone, also known as the Samsung Galaxy J2 Ace
 * J2, an open-source clone of the Hitachi/Renesas SuperH-2 microcontroller
 * J2 coefficient, representing the oblateness of Earth