2. A computer-driven process to facilitate user entry of logographic Chinese text, comprising operations of: receiving user entry of an ordered sequence of key presses representing an intended series of letters collectively spelling-out a sequence of one or more entries occurring in a predetermined dictionary, where each dictionary entry represents the phonetic spelling of one or more of the following items according to a predetermined system for phonetically representing logographic Chinese text: a Chinese character, a set of multiple Chinese characters, a radical or other grouping of multiple Character strokes; where user intention as to the intended series of letters is ambiguous because some or all of the key presses represent multiple phonetic letters; interpreting the sequence of key presses by allocating key presses in the sequence into contiguous segments such that letters of each segment's key presses spell a entry occurring in the dictionary, where a segment being appended by new key presses is a current segment, and where a next-earlier segment to the current segment in the sequence forms a previous segment; where the interpreting operation comprises: responsive to each new key press, determining whether if the new key press were to be appended to a trailing end of the current segment to form a new segment, letters of key presses of the new segment would by spell out any entries recognized by the dictionary; if the determining operation succeeds, presenting an output of one or more of the entries spelled out by the key presses of the new segment, and deeming the new segment to be the current segment; if the determining operation fails, appending the new key press to a trailing end of the current segment and attempting to shift key presses from a trailing end of the previous segment to a leading end of the current segment until letters of the key presses of both the current segment and the previous segment spell out respective entries occurring in the dictionary; limiting performance of said attempt to shift key presses to the current segment and the previous segment, and leaving intact all segments occurring earlier than the previous segment in the sequence of key presses; if said attempt to shift key presses succeeds, presenting an output of one or more of said entries spelled out by the key presses of the previous segment as shifted and the current segment as shifted; presenting an output of logographic Chinese text represented by one or more entries spelled by key presses of the segments into to which the sequence of key presses have been allocated.
2. A computer-driven process to facilitate user entry of logographic Chinese text, comprising operations of: receiving user entry of an ordered sequence of key presses representing an intended series of letters collectively spelling-out a sequence of one or more entries occurring in a predetermined dictionary, where each dictionary entry represents the phonetic spelling of one or more of the following items according to a predetermined system for phonetically representing logographic Chinese text: a Chinese character, a set of multiple Chinese characters, a radical or other grouping of multiple Character strokes; where user intention as to the intended series of letters is ambiguous because some or all of the key presses represent multiple phonetic letters; interpreting the sequence of key presses by allocating key presses in the sequence into contiguous segments such that letters of each segment's key presses spell a entry occurring in the dictionary, where a segment being appended by new key presses is a current segment, and where a next-earlier segment to the current segment in the sequence forms a previous segment; where the interpreting operation comprises: responsive to each new key press, determining whether if the new key press were to be appended to a trailing end of the current segment to form a new segment, letters of key presses of the new segment would by spell out any entries recognized by the dictionary; if the determining operation succeeds, presenting an output of one or more of the entries spelled out by the key presses of the new segment, and deeming the new segment to be the current segment; if the determining operation fails, appending the new key press to a trailing end of the current segment and attempting to shift key presses from a trailing end of the previous segment to a leading end of the current segment until letters of the key presses of both the current segment and the previous segment spell out respective entries occurring in the dictionary; limiting performance of said attempt to shift key presses to the current segment and the previous segment, and leaving intact all segments occurring earlier than the previous segment in the sequence of key presses; if said attempt to shift key presses succeeds, presenting an output of one or more of said entries spelled out by the key presses of the previous segment as shifted and the current segment as shifted; presenting an output of logographic Chinese text represented by one or more entries spelled by key presses of the segments into to which the sequence of key presses have been allocated. 7. The process of claim 2 , the attempted shifting comprising: shifting key presses one-at-a-time until conditions comprising the following are met: the key presses of both the current segment and the previous segment spell out respective entries recognized by the dictionary; and both of the respective entries satisfy predetermined criteria as to historical use.