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Transactions meet their responsibilities with the aid of several objects that serve as device drivers.
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The Dispenser object, for example, ultimately operates the dispensing device.
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The CardReader object reads and decodes the information on the bank card's magnetic strip.
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A common mistake would be to itemize all of the information stored on the bank card.
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Card encoding formats must certainly be well thought out and documented.
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However, for the purpose of designing the objects, we need only identify where that knowledge will be placed in the program.
