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

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).

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.