Information Technology Reference
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Figure 8. Sample XT9™ Mobile Interface
Figure 9. Unistroke, Graffiti™ and Jot™ sample letters
Word Suggestion
Jot™ alphabet provides a mix of unistroke and
multistroke letters and is deployed on a wide
range of handhelds. Experiments comparing
hand-printing with other text entry methods are
rare, but a comparison between hand-printing,
QWERTY-tapping and ABC-tapping on pen-based
devices (MacKenzie, Nonnecke, McQueen, Rid-
dersma, & Meltz, 1994) showed that a standard
QWERTY layout can achieve around 23wpm
while hand-printing achieved only 17wpm and
alphabetic soft-keyboard only 13wpm.
Word completion and suggestion can also be used
to help users by allowing them to pick full words
without entering all the letters. This was first
popularised with CIC's WordComplete™ (Figure
10), which suggested common word completions
for partially entered words. Similar technologies
are used on the eZiType™ and XT9 technologies
deployed on some mobile phones. While tempt-
ing, word suggestion and word completion needs
to perform very well in order to give users a real
benefit—savings in terms of letters entered can
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