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             | The 
                        pages were intentionally designed to be friendly and informal. 
                        We used a web interface with "back" buttons and graphical 
                        links. Although the pages could be displayed by standard 
                        internet browsers, we used a specialized browser called 
                        Glimmer, which was then customized by HP Labs so that 
                        we could log and save pages accessed by users, play video 
                        clips, and perform other custom operations. |  
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