A method, performed in a character entry system involves computing contextual associations between multiple character strings based upon occurrence of character strings relative to each other in documents present in the system, wherein the computing contextual associations involves i) identifying pertinent documents present in the system, ii) creating a list of character strings contained within documents in the system; and iii) creating an interrelationship between the character strings to contents of the system; in response to the user inputting a specified threshold of individual characters, identifying at least one selectable character string from among the character strings used in creating the computed contextual associations that can complete the incomplete input character string in context; providing the identified at least one selectable character string to a user for selection; and receiving, in the system, the user's selection and completing the incomplete input character string based upon the selection.