is when an object or class is based on another object or class, using the same implementation (inheriting from a class) specifying implementation to maintain the same behavior (realizing an interface; inheriting behavior).

A set or category of things having some property or attribute in common and differentiated from others by kind, type, or quality.

is the packing of data and functions into a single component. The

features of ..... are supported using classes in most

object-oriented programming languages, although other alternatives also

exist.