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The ATM, which has a screen, a keyboard, and an input slot and an output slot. It takes a credit card which is valided by
The ATM, which has a screen, a keyboard, and an input slot and an output slot. It
takes a credit card which is valided by keying in a PIN, determines the transaction
type (if valid), and either takes bills of several denominations or gives bills of several
denominations, then gives back the credit card (unless it has been reported stolen). If
necessary, it produces error messages on the screen
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