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 The Junkers J 1, nicknamed the ''Blechesel'' ("Tin Donkey" or "Sheet Metal Donkey"), was an experimental monoplane aircraft developed by Junkers & Co. It was the world's first all-metal aircraft. Manufactured early on in the First World War, ...

, a 1916 German aircraft *

Junkers J.I The Junkers J.I (manufacturer's name J 4) was a German "J-class" armored sesquiplane of World War I, developed for low-level ground attack, observation and army cooperation. It is especially noteworthy as being the first all-metal aircraft to ...

, a 1917 German aircraft *

Lawrance J-1 The Lawrance J-1 was an engine developed by Charles Lanier Lawrance and used in American aircraft in the early 1920s. It was a nine-cylinder, air-cooled radial design. Development During World War I the Lawrance Aero Engine Company of New Yor ...

, an early 1920s engine used in American aircraft

Locomotives

* LB&SCR J1 class, a British LB&SCR locomotive *

PRR J1 The PRR J1 was a class of 2-10-4 "Texas" type steam locomotives with driving wheels built between 1942 and 1944. The J1 had over of tractive effort, plus an additional if the booster engine was used. Features As with many of the Pennsylvan ...

, an American PRR steam locomotive

Other vehicles

* J-I rocket, a Japanese solid rocket expendable launch vehicle *

J1 type submarine The , also called were large cruiser submarines ( Junsen type submarines) of the Imperial Japanese Navy. Four boats were built between 1926 and 1929. These boats, based on the KD2 and U-139 designs, were of a junsen, or cruiser, type with an ...

, a World War II Imperial Japanese Navy cruiser submarines class * HMS ''J1'', a 1915 World War I British submarine * 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 J1 World Tour () was the first concert tour by Taiwanese singer Jolin Tsai. It started on August 7, 2004, in Shanghai, China at Hongkou Football Stadium and continued throughout Asia and North America before concluding on April 22, 2006, in Irvi ...

, a concert tour by Taiwanese singer Jolin Tsai * ''

J1 Live Concert ''J1 Live Concert'' () is a live video album by Taiwanese singer Jolin Tsai. It was released on September 23, 2005, by Sony BMG. It chronicled the J1 World Tour at Chungshan Soccer Stadium in Taipei, Taiwan on November 20, 2004. It also contain ...

'', a 2005 live album by Taiwanese singer Jolin Tsai * "J1" (song), a 2008 song by Mallu Magalhães *

J.I the Prince of N.Y Justin Irvin Rivera (born September 23, 2001), better known by his stage name J.I the Prince of N.Y or more recently simply J.I., is an American rapper, singer, and songwriter. He is best known for his 2019 breakout single "Need Me", which has ...

, American rapper also known as J.I.

In mathematics and science

ATC code J01 J01A Tetracyclines J01AA Tetracyclines :J01AA01 Demeclocycline :J01AA02 Doxycycline :J01AA03 Chlortetracycline :J01AA04 Lymecycline :J01AA05 Metacycline :J01AA06 Oxytetracycline :J01AA07 Tetracycline :J01AA08 Minocycline :J01AA09 Rolitetracy ...

, ''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 haplogr ...

, a Y-DNA haplogroup * Janko group J₁, in mathematics *

S/2003 J 1 Eukelade , also known as , is a retrograde irregular satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard in 2003, and received the temporary designation . Eukelade is about 4 ki ...

, a former name for Eukelade, a satellite of Jupiter * First-order

Bessel function Bessel functions, first defined by the mathematician Daniel Bernoulli and then generalized by Friedrich Bessel, are canonical solutions of Bessel's differential equation x^2 \frac + x \frac + \left(x^2 - \alpha^2 \right)y = 0 for an arbitrar ...

of the first kind, denoted

j_1

* J01, the ICD-10 code for acute

sinusitis Sinusitis, also known as rhinosinusitis, is inflammation of the mucous membranes that line the sinuses resulting in symptoms that may include thick nasal mucus, a plugged nose, and facial pain. Other signs and symptoms may include fever, head ...

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

equilateral square pyramid In geometry, a square pyramid is a pyramid having a square base. If the apex is perpendicularly above the center of the square, it is a right square pyramid, and has symmetry. If all edge lengths are equal, it is an equilateral square pyramid, ...

Other uses

J-1 visa A J-1 visa is a non-immigrant 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 within the U.S. All ...

, a type of U.S. visa for exchange visitors * The J1 League, 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 J1 ...

, 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, that advises the president of the United States, the secretary of defense, the Homeland Security Council and the ...