•Objects permit
certain operations and do not support others
•OO programs contain statements in which objects are asked to carry
out certain operations
•It is possible for
two or more objects to support the same operations and to have the same
state, yet to be different from each other – each object has its own identity
•A class then
describes a collection of related objects
•Question: Consider a
word processor. Find at least five classes of objects that it
manipulates.