T9, which stands for Text on 9 keys, is a patented predictive text technology for mobile phones, originally developed by Tegic Communications, now part of Nuance Communications.
T9 is used on phones from LG, NEC, Nokia, Samsung Electronics, Siemens, Sony Ericsson, Sanyo, Sagem and others. It was also used by Texas Instruments PDA Avigo during the late 90s. Its main...