Yijue How and Min-Yen Kan
Optimizing SMS Entry (HCII 2005)
4/16
Current approaches
•Many approaches.  Among most popular:
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•Multi-tap
–Press key multiple times to reach desired letter
–3 Χ          “c” + wait +           “a” +            “t” = “cat”
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•Tegic T1
–Use frequency of English words to place most likely alternatives first
–Use a  next  key to indicate next alternative
–2 Χ          “ba”  +           “act” + next = “cat”
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•Common feature:
•Use one key for space (e.g., 0), another for symbols (e.g., 1), so less than 12 keys