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^Cargile, Andy; Fry, Ken (2008), "Managing the Evolution of Microsoft's Hardware Business", in Lockwood, Thomas; Walton, Thomas, Building Design Strategy: Using Design to Achieve Key Business Objectives, Allworth Communications, p. 87, ISBN978-1-58115-653-9, The division was originally charged with creating the company's first mouse compatible with Microsoft Word. [...] the 1990s saw an expanding variety of products, including PC keyboards, gaming joysticks and gamepads, a cordless telephone system, PC audio speakers, and trackball devices.