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object-oriented programming language
subject			fact

object-oriented programming language	has definition A programming language in which each data item with the operations used on it is designated as an object; the routines used to operate on the data item are called methods; and objects are grouped in a hierarchy of classes, with each class inheriting characteristics from the class above it
	has features Identity: The language must allow a programmer to refer to an object without having to refer to the instance variables contained in the object. Every object has a unique identity; therefore objects that contain instance variables with the same values must be recognized as different objects Classes: The programmer must be able to organize the code into classes, each of which describes the structure and function of a set of objects Inheritance: There has to be a mechanism to organize these classes into inheritance hierarchies, where features inherit from superclasses to subclasses Polymorphism: There has to be a mechanism by which several methods, in related classes, can have the same name and implement the same abstract operation. There must consequently be a dynamic binding mechanism that allows the choice of which method to run to be made during execution of the program
	has features abstraction, modularity and encapsulation
	is a subtopic of Java History and Related Languages
	is a kind of programming language

Kinds of object-oriented programming language :

• C++ (10 facts)
• Java (5 kinds, 50 facts) - An object-oriented programming language developed by Sun Microsystems
• Objective-C (2 facts)
• Simula-67 (4 facts)
• Smalltalk (3 facts)