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Pi: T9 predictive text uses a simple pattern matching system to make it so you can dial a word like you would if it were given as a phone number; each sequence of digits acts as a pointer to a list of words that would match those digits.
For instance, to get the word "fires", you type in 34737, and it shows you a list of words that match that (fires, and firer), and then you choose the correct word from the list. Compare this to the normal method, where to get fires, you would type 333444777337777.
It is particularly useful in cases where there are consecutive letters on the same key (like abcess: 222377 or 2,22,222337777,7777) where to get the second letter you must wait a few moments between keypresses. On the other hand, a word not in the dictionary still requires more input.
The advantage of T9 is only meaningful if you do text messaging.
Vorn
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