Object Oriented Programming (first version -- of three) Programming methodology in which the data elements (objects) in the system form the fundamental unit of program decomposition.
Object Oriented Programming (second version) Programming methodology in which the data elements (objects) in the system form the fundamental unit of program decomposition. Objects are described by means of classes.
Type Specialization Principle In any context in which an object of a given class may be used, any object of a subclass may be substituted.
Object Oriented Programming (final version)
Principle of Abstraction
Information Hiding Principle
ISA A relationship between a subclass and its superclass. Other relationships are possible but this is the norm. An object of a subclass ISA (is a) object of its superclass. It exhibits all of the properties of a superclass object. Implies that the subclass is a specialization of the superclass.
ISLike A relationship between a class and its superclass. A weaker relationship than ISA. It is used only for code reuse rather than as an abstraction mechanism. Implies that the subclass is a modification of its uperclass. Some item of the semantics has changed.
HASA (uses) A relationship between classes. The relationship A HASA B is true if B is used to implement A. One of A's components is an element in B. Sometimes we make a choice between ISA and HASA when designing a new class.
Dynamic Binding Principle