High Quality Content by WIKIPEDIA articles! Predictive text is an input technology most commonly used on mobile phones, and for accessibility. The technology allows some common words to be entered by a single keypress for each letter, as opposed to the multiple keypress approach used in the older generation of mobile phones. The intent is to simplify the writing of text messages, e-mail, entries into an address book or calendar, and the like. Theoretically, the number of keystrokes per character, on average, is comparable to using a full, unambiguous keyboard, provided that all words used (including all slang, proper nouns, abbreviations, urls, foreign-language words and so on) are in the dictionary, punctuation is ignored, and that no spelling mistakes or typing mistakes are made. In practice, however, these factors are found to be crucial to speed and accuracy, as has been demonstrated in experiments with real users.

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