Type 0 or Type O may refer to:

Type 0

Aircraft

*Type 0 Carrier Fighter Mitsubishi A6M, a Japanese fighter aircraft *Type 0 Observation Seaplane Mitsubishi F1M, 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, 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, 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 ...