technique to enter text using a mobile phone keypad (T9 dictionary-based disambiguation)

[bearophileHUGS at lycos.com]

Note that this is essentially a data-compression problem, so the most
accurate solution is probably to use an instrumeted PAQ compressor in a
certain smart way, but you have to work a lot to implement this
solution, and maybe this problem doesn't deserve all this work.

Bye,
bearophile