T9 allows you to enter entire words by a single key press on a letter, instead of having to tap a key multiple times to rotate through all the possible letters until you get to the one you want.

T9,) allows you to enter text by pressing only one key per letter on a keypad where multiple letters share keys. As you enter a word, the phone will automatically compare all of the possible ...

It prioritizes words based on the frequency of use and can adapt to user preferences. [Guy] implemented T9 in Circuit Python, mainly for the RP2040 microcontroller used on the Raspberry Pi Pico ...