Associatrions
An association is where objects are related to each other in some fashion For example a human object that watches a television object is associated to that television object In this situation, the association might be called turn on as the association begins when the human turns the TV on. This association is unidirectional Other associations such as marriage are bi-directional In some cases an object may be associated with another object in more than way. It is possible for a class of objects to be associated with one or more other classes Multiplicity is the specification of how many objects in one class relate to a single object of an associated class For example one lecturer teaches the students in this class, however many students are taught by this one lecturer