Text Entry Using a Small Number of Buttons
I. Scott MacKenzie, York University, Toronto, ON, Canada
Kumiko Tanaka-Ishii, University of Tokyo, Tokyo, Japan
5.1 INTRODUCTION
This chapter focuses on systems in which the user enters text by pressing keys or buttons and in which more than one character or letter is assigned to each button. Such keyboards are ambiguous because there is uncertainty as to the intended symbol when a key is pressed. There is recent worldwide interest in such ambiguous keyboards because of mobile computing, for which space is limited. Also, such keyboards widen the communications possibility for users with physical disabilities who have insufficient motor facility to operate a full-size keyboard ...
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