VoCal is a vocal appointment manager running on Pocket PC founded by Microsoft Research in the framework of RFP embedded which is useful to evaluate usefulness and usability of standard PDA for visually impaired persons. The aim of this application is to allow blind users to manage their appointments on a Pocket PC during a mobility situation. This prototype has been developed using a centered design method 7. This paper deals particularly with VoCal functionalities and the non-visual interaction input/output modalities.
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