Objects are the real life things likes car, pen, class, etc. which are used as single entity to describe the all the properties of object. In Object oriented programming language a class have data member, member functions and constructor all these properties are treated as single entity called Object. In pure object oriented programming languages everything is dealing in the form of Objects. In between each object is made into a generic class of object and even more generic classes are defined so that Objects can share models and reuse the class definitions in their code. Each object is an instance of a particular class or subclass with the class"s own methods or procedures and data variables. An object is what actually runs in the computer.