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 for data type
From The Free On-line Dictionary of Computing (30 December 2018) :

  data type
      (Or "data type") A set of values from
     which a variable, constant, function, or other
     expression may take its value.  A type is a classification
     of data that tells the compiler or interpreter how the
     programmer intends to use it.  For example, the process and
     result of adding two variables differs greatly according to
     whether they are integers, floating point numbers, or strings.
     Types supported by most programming languages include
     integers (usually limited to some range so they will fit in
     one word of storage), Booleans, floating point numbers,
     and characters.  Strings are also common, and are
     represented as lists of characters in some languages.
     If s and t are types, then so is s -> t, the type of
     functions from s to t; that is, give them a term of type s,
     functions of type s -> t will return a term of type t.
     Some types are primitive - built-in to the language, with no
     visible internal structure - e.g. Boolean; others are
     composite - constructed from one or more other types (of
     either kind) - e.g. lists, arrays, structures, unions.
     Object-oriented programming extends this with classes
     which encapsulate both the structure of a type and the
     operations that can be performed on it.
     Some languages provide strong typing, others allow implicit
     type conversion and/or explicit type conversion.

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