1. A data entry device comprising: a digitizer having a plurality of key input regions for receiving stroke inputs, each key input region having a plurality of characters indicated thereon, the digitizer having an output providing x and y co-ordinate data for stroke inputs; a computational device coupled to the digitizer, the computational device accepting x and y co-ordinate data from the digitizer and identifying a key input region in which a stroke is entered and measuring parameters of the entered stroke; and a memory coupled to the computational device, the memory having stored therein correlation information correlating stroke parameters for a given key input region with characters indicated on that input region.