See object-oriented DBMS. OOP Traditional Programming class define data + processing object data + processing attribute data (a field) method function message function call instantiate allocate a ...

An abstract class is a template definition of methods and variables in a specific class, or category of objects. In programming, objects are units of code, and each object is made into a generic class ...

It covers both object-oriented programming techniques and their application to program design including classes, objects and objects lifecycle, abstraction, encapsulation, inheritance, polymorphism ...