U4, U-4, or U04 may refer to:
Science and technology
*
U4 spliceosomal RNA
The U4 small nuclear Ribo-Nucleic Acid (U4 snRNA) is a non-coding RNA component of the major or U2-dependent spliceosome – a eukaryotic molecular machine involved in the splicing of pre-messenger RNA (pre-mRNA). It forms a duplex with U6 spli ...
, a non-coding RNA component of the major U2-dependent spliceosome
*
Haplogroup U4 (mtDNA), a human genetic group
* U4,
unitary group
Unitary may refer to:
Mathematics
* Unitary divisor
* Unitary element
* Unitary group
* Unitary matrix
* Unitary morphism
* Unitary operator
* Unitary transformation
* Unitary representation
* Unitarity (physics)
* ''E''-unitary inverse semi ...
of degree 4
*
U-47700
U-47700, also known as U4, pink heroin, pinky, and pink, is an opioid analgesic drug developed by a team at Upjohn in the 1970s which has around 7.5 times the potency of morphine in animal models.
U-47700 is a structural isomer of the earlier op ...
, a synthetic opioid
* U04, the
ICD-10
ICD-10 is the 10th revision of the International Classification of Diseases (ICD), a medical classification list by the World Health Organization (WHO). It contains codes for diseases, signs and symptoms, abnormal findings, complaints, social cir ...
code for severe acute respiratory syndrome
Transport
* U-Bahn lines
**
U4 (Berlin U-Bahn)
**
U4 (Frankfurt U-Bahn)
**
U4 (Hamburg U-Bahn)
**
U4 (Munich U-Bahn)
**
U4 (Vienna U-Bahn)
*
German submarine ''U-4'', one of several German submarines
*
London Buses route U4
* U-4, the U.S. Air Force version of the
Aero Commander (aircraft)
The Aero Commander 500 family is a series of light twin piston-engined and turboprop aircraft originally built by the Aero Design and Engineering Company in the late 1940s, renamed the Aero Commander company in 1950, and later a division of Ro ...
, a light twin-engined aircraft from Aero Design and Engineering Company
* U-4, the Japanese air self-defense force designation for the
Gulfstream IV
The Gulfstream IV (or G-IV or GIV) and derivatives are a family of twinjet aircraft, mainly for private or Business jet, business use. They were designed and built by Gulfstream Aerospace, a General Dynamics company based in Savannah, Georgia, ...
aircraft
* U4,
PMTair (former) IATA airline designator
* U4,
Buddha Air current IATA airline designator
Other uses
* U4, the former name of the
Maple League of Universities
* U4, an
unemployment figure released by the United States Bureau of Labor Statistics
* ''
Ultima IV: Quest of the Avatar'', a video game
* U4 Anti-Corruption Resource Centre en organisasjon under
See also
*
4U (disambiguation)
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