Type 0 or Type O may refer to:

Type 0

Aircraft

*Type 0 Carrier Fighter

Mitsubishi A6M The Mitsubishi A6M "Zero" is a long-range carrier-capable fighter aircraft formerly manufactured by Mitsubishi Aircraft Company, a part of Mitsubishi Heavy Industries. It was operated by the Imperial Japanese Navy (IJN) from 1940 to 1945. The ...

, a Japanese fighter aircraft *Type 0 Observation Seaplane

Mitsubishi F1M The Mitsubishi F1M ( Allied reporting name "Pete") is a Japanese reconnaissance floatplane of World War II. It was the last biplane type of the Imperial Japanese Navy, with 944 built between 1936 and 1944. The Navy designation was "Type Zero Obse ...

, a Japanese reconnaissance seaplane *Type 0 Reconnaissance Seaplane

Aichi E13A The Aichi E13A (World War II Allied names for Japanese aircraft, Allied reporting name: "Jake") is a long-range reconnaissance seaplane used by the Imperial Japanese Navy (IJN) from 1941-45. Numerically the most important floatplane of the IJN, i ...

, a Japanese reconnaissance seaplane *Type 0 Small Reconnaissance Seaplane Yokosuka E14Y, a Japanese submarine-based reconnaissance seaplane *Type 0 Transport Showa/Nakajima L2D, a Japanese transport aircraft

Watercraft

*Type-0 heavy lift vessel Dockwise Vanguard, a semi-submersible heavy lift ship

Entertainment

* '' Final Fantasy Type-0'', a video game

Science

Glycogen storage disease type 0 Glycogen storage disease type 0 is a disease characterized by a deficiency in the glycogen synthase enzyme (GSY). Although glycogen synthase deficiency does not result in storage of extra glycogen in the liver, it is often classified as a glycogen ...

, a disease *Type 0 civilization in the

Kardashev scale The Kardashev scale () is a method of measuring a civilization's level of technology, technological advancement based on the amount of energy it is capable of harnessing and using. The measure was proposed by Soviet astronomer Nikolai Kardashev i ...

of technological advancement *Type-0 language or

Recursively enumerable language In mathematics, logic and computer science, a formal language is called recursively enumerable (also recognizable, partially decidable, semidecidable, Turing-acceptable or Turing-recognizable) if it is a recursively enumerable subset in the set o ...

in the Chomsky hierarchy of formal languages *

Type 0 string theory The Type 0 string theory is a less well-known model of string theory. It is a superstring theory in the sense that the worldsheet theory is supersymmetric. However, the spacetime spectrum is not supersymmetric and, in fact, does not contain any fe ...

, a model of string theory

Type O

*Type O in the

ABO blood group system The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes (red blood cells). For human blood transfusions, it is the most important of the 47 different blood type (or group) c ...

*an

O-type star An O-type star is a hot, blue star of spectral type O in the Yerkes classification system employed by astronomers. They have surface temperatures in excess of 30,000 kelvins (K). Stars of this type have strong absorption lines of ionised h ...

**an

O-type main-sequence star An O-type main-sequence star (O V) is a main-sequence (core hydrogen-burning) star of spectral type O and luminosity class V. These stars have between 15 and 90 times the mass of the Sun and surface temperatures between 30,000 and 50,000 K. Th ...

**an

O-type giant In astronomy, a blue giant is a hot star with a luminosity class of III (giant) or II (bright giant). In the standard Hertzsprung–Russell diagram, these stars lie above and to the right of the main sequence. The term applies to a variety of s ...

star **a

subdwarf O star A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness about 10 to 100 times that of the Sun, and have a mass approximately half that of the Su ...

*the

Handley Page Type O The Handley Page Type O was a biplane bomber used by Britain during the First World War. When built, the Type O was one of the largest aircraft in the world. There were two main variants, the Handley Page O/100 (H.P.11) and the Handley Page O ...