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![Alto mouse, 1972. Rolling ball mouse made by Bill English and this team at Xerox PARC for Alto computers. Copyright© Mark Richards Alto mouse, 1972. Rolling ball mouse made by Bill English and this team at Xerox PARC for Alto computers. Copyright© Mark Richards](https://i.pinimg.com/736x/5d/02/f0/5d02f0750386823f4f7df5c246d68990.jpg)
Alto mouse, 1972. Rolling ball mouse made by Bill English and this team at Xerox PARC for Alto computers. Copyright© Mark Richards
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