https://en.wikipedia.org/wiki/Data_type

In computer science and computer Programming, a data type or simply type is a classification identifying one of various types of data, such as real, integer or Boolean, that determines the possible values for that type; the operations that can be done on values of that type; the meaning of the data; and the way values of that type can be stored.

http://programmers.stackexchange.com/questions/291950/are-data-type-declarators-like-int-and-char-stored-in-ram-when-a-c-program-e

Weak And Strong Typing

static vs dynamic typing: http://stackoverflow.com/questions/1517582/what-is-the-difference-between-statically-typed-and-dynamically-typed-languages (see third answer).

How do compiled dynamically typed languages work? Do they store type data (unlike it says here?)

https://en.wikipedia.org/wiki/Type_inference

http://stackoverflow.com/questions/1393883/why-is-dynamic-typing-so-often-associated-with-interpreted-languages

Data types

Integer

Float

String

Other classes

Immutable type