Class

Class is an abstract representation for some particular type of object. It is often described as a plan or blueprint for an object, as opposed to the actual object, itself. Thus, objects are specific and concrete -- as much as anything is concrete within a computer -- and, thereby, come into existence at some specific time, persist for some duration, and then disappear when they are no longer needed; classes are the abstract descriptions used by the system to create objects when called upon to do so.

Class. Shows a class, as an abstraction, that may at some time be instantiated within a program to produce individual objects.