CIRRIN is a stylus-based text input method for a mobile device with a touchscreen. Unlike Swype, it has a circular keyboard as shown below.
Text entry method is almost same with Swype. Just move the stylus over the letter while pressing down on the touch screen. The following figure illustrates how to input "today".
Links: I. Venezia, "Stylus based text input using expanding CIRRIN," in Proceedings of the working conference on advanced visual interfaces, pp. 163-166, 2006.
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