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Grandpa's Amazing Computer
註釋Ollie knows a lot about computers. But when he goes to visit his grandfather one weekend, he discovers that Grandpa doesn't have a clue about them. And Grandpa could really use a computer, because he's so forgetful these days. Ollie is amazed when his grandfather tells him he has one of the world's oldest computers lying around somewhere. It sounds incredible to Ollie -- and very mysterious. What is the secret of Grandpa's computer?