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Visual Modeling with Rational Rose 2002 and UML by Terry Quatrani

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What is an Object?

An object is a representation of an entity, either real-world or conceptual. An object can represent something concrete, such as Joe's truck or my computer, or a concept such as a chemical process, a bank transaction, a purchase order, Mary's credit history, or an interest rate.

An object is a concept, abstraction, or thing with well-defined boundaries and meaning for an application. Each object in a system has three characteristics: state, behavior, and identity.

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