Abstract: The present invention relates to a mandarin phonetic inputting apparatus by using sixteen keys. It achieves the purpose of conveniently operating for those people are not skilled in typewriting, and provides a capability of detecting ambiguous tones in mandarin language for degrading reentering caused by misunderstanding the ambiguous tones, and furthermore, to serve as a user input interface in a handhold calculator with more economical efficiency.

Abstract: The present invention relates to an apparatus for recording user behavior information when an inputting scheme of any kind of language is applied. To extract the user behavior information in the future for achieving the purpose of degrading disadvantage of reentering that caused by misunderstanding or inputting errors. The present invention structurally includes an inputting unit, a word and phrase database unit, a user behavior database unit, a word and phrase generating unit, and a word and phrase outputting unit. After inputting words and phrases information from the inputting unit, the word and phrase generating unit generates meaningful words or phrases by using the words and phrases information, and in accordance with the information of word and phrase database unit, and information from the user behavior database unit. Finally, the word and phrase outputting unit outputs the meaningful words or phrases to the user.