Definition   CLASSIFICATION is the process of grouping objects having like properties (structure and behavior) into sets.

Definition   A CLASS is a set of objects grouped together as a result of classification.

Definition   An INSTANCE is an individual element of a class.

Definition   An OBJECT,  in the abstract,  is a collection of ``parts,  '' ``behaviors,  '' and ``relations.''

Definition   An OBJECT,  for practical programming purposes,  is either a class or an instance of a class.

Definition   A STATIC OBJECT is sometime used to refer to a class.

Definition   A DYNAMIC OBJECT is sometimes used to refer to an instance of a class.