J1, J01, J.I, J-I or J-1 may refer to:

Vehicles

Aircraft

* AEG J.I, a World War I German ground attack aircraft * Albatros J.I, a 1917 German ground-attack single-engine biplane aircraft * Junkers J 1, a 1916 German aircraft *

Junkers J.I The Junkers J.I (manufacturer's name J 4) was a German Idflieg aircraft designation system, "J-class" armored sesquiplane of World War I, developed for low-level attack aircraft, ground attack, Aerial reconnaissance, observation and liaison airc ...

, a 1917 German aircraft * Lawrance J-1, an early 1920s engine used in American aircraft

Locomotives

* LB&SCR J1 class, a British LB&SCR locomotive * LNER Class J1, a class of British steam locomotives * PRR J1, an American PRR steam locomotive

Other vehicles

* J-I rocket, a Japanese solid rocket expendable launch vehicle * J1 type submarine, a World War II Imperial Japanese Navy cruiser submarines class * HMS ''J1'', a 1915 World War I British submarine * JAC J1, a subcompact car * Al Fahd 300 (J-1), an Iraqi surface-to-surface missile project

In arts and entertainment

* J-1 World Heavyweight Championship, a professional wrestling competition * J1 World Tour, a concert tour by Taiwanese singer Jolin Tsai * ''

J1 Live Concert ''J1 Live Concert'' () is a live video album by Taiwanese singer Jolin Tsai, released by Sony BMG on September 23, 2005. The album features a recording of Tsai's performance from the J1 World Tour concert, held on November 20, 2004, at the Chun ...

'', a 2005 live album by Taiwanese singer Jolin Tsai * "J1" (song), a 2008 song by Mallu Magalhães * J.I the Prince of N.Y, American rapper also known as J.I.

In mathematics and science

* ATC code J01, ''Antibacterials for systemic use'', a subgroup of the Anatomical Therapeutic Chemical Classification System *

Haplogroup J1 (Y-DNA) Haplogroup J-M267, also commonly known as Haplogroup J1, is a subclade (branch) of Y-DNA haplogroup J-P209 (commonly known as haplogroup J) along with its sibling clade haplogroup J-M172 (commonly known as haplogroup J2). (All these haplog ...

, a Y-DNA haplogroup * Janko group J₁, in mathematics * S/2003 J 1, a former name for Eukelade, a satellite of Jupiter * First-order

Bessel function Bessel functions, named after Friedrich Bessel who was the first to systematically study them in 1824, are canonical solutions of Bessel's differential equation x^2 \frac + x \frac + \left(x^2 - \alpha^2 \right)y = 0 for an arbitrary complex ...

of the first kind, denoted

j_1

* J01, the ICD-10 code for acute

sinusitis Sinusitis, also known as rhinosinusitis, is an inflammation of the mucous membranes that line the sinuses resulting in symptoms that may include production of thick nasal mucus, nasal congestion, facial congestion, facial pain, facial pressure ...

, a medical condition * J₁, the Johnson solid notation for an equilateral square pyramid

Other uses

J-1 visa A J-1 visa is a non-immigrant visa (document), visa issued by the United States to research scholars, professors and exchange visitors participating in programs that promote cultural exchange, especially to obtain medical or business training w ...

, a type of U.S. visa for exchange visitors * The

J1 League The , the J.League or the for sponsorship reasons, is a professional association football league in Japan and the highest level of the Japanese football league system. Contested by 20 clubs, it operates on a system of promotion and relegation ...

, the top division of Japanese association football *

Samsung Galaxy J1 The Samsung Galaxy J1 is an Android smartphone developed by Samsung Electronics. It was released in January 2015 and is the first phone of the Galaxy J series. It was marketed as an entry-level device starting at $100. History The Galaxy J ...

, a smartphone * J1, abbreviation, reference to the director staff of the

Joint Chiefs of Staff The Joint Chiefs of Staff (JCS) is the body of the most senior uniformed leaders within the United States Department of Defense, which advises the president of the United States, the secretary of defense, the Homeland Security Council and ...