Essay 43 ~. .. -.... - - : _ ~ ! Metaphor Design in User Interfaces Aaron Marcus Aaron Marcus and Associates, Inc. 1144 65th Street, Suite F Emeryville, California 94608-1053 USA Aaron@AMandA.com http://www.AMandA.com Successful user interfaces consist of partially general and partially unique solutions to the design of metaphors, the fundamental concepts communicated through words and images, as well as through sound and interaction. By controlling the user's expectation of familiar structures and processes and surprise at novel approaches, the user-interface designer can achieve compelling forms that enable the user to be more productive. Introduction n 1997, the U.S.Justice Department asked a Federal judge to fine Microsoft Corporation $1 million per day relating to the inclusion of Microsoft's Internet browser with the Windows 95 operating system. A contemporary article in the New York Times [Johnson, 1997] commenting on the fracas described this landmark antitrust case in cyberspace as essentially a fight about the power of metaphors. The author compared the situation to a company controlling almost all officedesk manufacturing that added a free built-in phone to the desk and declared that the concept of the desk now includes the concept of the phone, and by the way,
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