T9 is a predictive text technology for mobile phones with 3x4 numeric keypads
Originally developed by Tegic Communications, now part of Nuance
Used by major manufacturers including Verizon, Nokia, Samsung, and Sony
Still used on niche products like Punkt mp-02
Core Features
Allows single keypress for each letter in text entry
Uses dictionary to order words by frequency of use
Dictionary can be expanded via multi-tap
Supports smart punctuation and word completion
Can recognize and correct typing errors
Technical Aspects
Achieves compression ratio of close to 1 byte per word
Uses optimized algorithm maintaining word order
Can suggest words based on common combinations
Supports multiple languages in later versions
Current Status
Obsolete in newer phones with touchscreens
Still used by users with larger fingertips
Available on LG, Samsung keyboards, and third-party keyboards
Yanıtı değerlendir
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