A type or type A may refer to: A-type asteroid, a type of relatively uncommon inner-belt asteroids A type blood, a type in the ABO blood group system A-type inclusion, a type of cell inclusion A-type potassium channel, a type of voltage-gated potassium channel A type proanthocyanidin, a specific type of flavanoids A-type star, a class of stars Type A Dolby Noise Reduction, a type of Dolby noise-reduction system Type A climate, a type in the Köppen climate classification Type A flu, 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, a music label that for example produced the 2004 album What Doesn't Kill You... Wikipedia