A type or type A may refer to: *

A-type asteroid A-type asteroids are relatively uncommon inner-belt asteroids that have a strong, broad 1 μm olivine feature and a very reddish spectrum shortwards of 0.7 μm. They are thought to come from the completely differentiated mantle of an asteroid ...

, a type of relatively uncommon inner-belt asteroids *

A type blood The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes. For human blood transfusions, it is the most important of the 43 different blood type (or group) classification system ...

, a type in the ABO blood group system *

A-type inclusion Downie bodies, also known as a type of A-type inclusion, are a type of inclusion body associated with cowpox. They are named for Allan Watt Downie. A Downie body is different from a ''Downey cell'' which is a reactive lymphocyte. They are named f ...

, a type of cell inclusion * A-type potassium channel, a type of voltage-gated potassium channel *

A type proanthocyanidin A type proanthocyanidins are a specific type of proanthocyanidins, which are a class of flavonoid. Proanthocyanidins fall under a wide range of names in the nutritional and scientific vernacular, including oligomeric proanthocyanidins, flavonoids, ...

, a specific type of flavonoids *

A-type star An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V (five). These stars have spectra defined by strong hydrogen Balmer absorption lines. They measure between 1 ...

, a class of stars *

Type A Dolby Noise Reduction A Dolby noise-reduction system, or Dolby NR, is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. The first was '' Dolby A'', a professional broadband noise reduction s ...

, a type of Dolby noise-reduction system * Type A climate, a type in the Köppen climate classification *

Type A flu '' A virus'' (''IAV'') causes influenza in birds and some mammals, and is the only species of the genus ''Alphainfluenzavirus'' of the virus family ''Orthomyxoviridae''. Strains of all subtypes of influenza A virus have been isolated from wil ...

, a type of influenza virus * Type A evaluation of uncertainty, an uncertainty in measurement that can be inferred, for example, from repeated measurement * Type A (label), a music label that for example produced the 2004 album '' What Doesn't Kill You...'' by Candiria *

Type A personality Type A and Type B personality hypothesis describes two contrasting personality types. In this hypothesis, personalities that are more competitive, highly organized, ambitious, impatient, highly aware of time management, or aggressive are labeled ...

, a personality type in the Type A and Type B personality theory * Type A submarine, a class of submarines in the Imperial Japanese Navy which served during the Second World War *

Hemophilia type A Haemophilia A (or hemophilia A) is a genetic deficiency in clotting factor VIII, which causes increased bleeding and usually affects males. In the majority of cases it is inherited as an X-linked recessive trait, though there are cases which arise ...

, a type of haemophilia * Renault A-Type engine, a straight-4 automobile engine *

Toyota Type A engine The Type A engine was a straight-six engine produced from 1935 through 1947 by Toyota. The Type B was a technically more advanced version of the Type A. There was an enlarged version of this, called the Type D, but it did not enter production. The ...

* Vauxhall A-Type, a car manufactured by Vauxhall Motors from 1908 to 1915 * Type A (artist collective), a pair of New York-based artists named Adam Ames and Andrew Bordwin * A-type granite a type of granite rock *

Adenosine receptor The adenosine receptors (or P1 receptors) are a class of purinergic G protein-coupled receptors with adenosine as the endogenous ligand. There are four known types of adenosine receptors in humans: A1, A2A, A2B and A3; each is encoded by a dif ...

See also