Subtype may refer to:
* Viral subtypes, such as
Subtypes of HIV
*
Subtyping
In programming language theory, subtyping (also subtype polymorphism or inclusion polymorphism) is a form of type polymorphism in which a subtype is a datatype that is related to another datatype (the supertype) by some notion of substitutability, ...
, a form of type polymorphism in programming language theory
{{disambiguation