T9 (predictive text)

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T9 is a predictive text technology for mobile phones (specifically those that contain a 3×4 numeric keypad), originally developed by Tegic Communications, now part of Nuance Communications. T9 stands for Text on 9 keys. T9 was used on phones from Verizon, NEC, Nokia, Samsung Electronics, Siemens, Sony Mobile, Sanyo, SAGEM and others, as well as PDAs such as the Avigo during the late 1990s. The main competing technologies include iTap created by Motorola, SureType created by RIM, Eatoni's LetterWise and WordWise, and Intelab's Tauto. It is still used on niche products such as the Punkt mp-02. As of 2010, the technology was present on more than four billion devices. T9 is available on certain phones without a touchscreen, and is available on Android and Apple iPhone (as of iOS 18) phones as a custom keyboard.