The concept of Class and object in Programming.

Описание: In object-oriented programming , a class is a template definition of the method s and variable s in a particular kind of object . The class is one of the defining ideas of object-oriented programming.

Thus, an object is a specific instance of a class; it contains real values instead of variables.
Objects can correspond to things found in the real world.
An object has state (data) and behaviour (code).