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Each modality is presented in terms of perception, technology and applications. In particular, the talk covers the area of non-speech audio, with discussion of Earcons, Auditory Icons, sonification and other forms of sound. For haptics, force-feedback, vibrotactile, and ultrasound feedback are described along with pressure and force input. For smell, we will discuss how smells can be generated, how they can be used and some of the limitations that exist, before describing some of the successful applications. 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