Abstract: The invention relates to a computerized system for predicting completions to input text which is typed by a user to a text-oriented active application within a client computer, which comprises: (a) an off-line server that gathers texts from textual repositories, analyzes and processes the same to produce entries for an off-line database, said off-line server updates periodically a real time database of a real time server; (b) a real-time prediction server for receiving from an agent at said client computer serial requests for predictions, extracting in response to each of said requests one or more text predictions from tables within said real time database, and for conveying said one or more text predictions to said agent, wherein each of said text predictions comprises one or more words; (c) said real time database which comprises one or more tables containing word combination entries of various sizes, wherein each of said entries is associated with a weight which is used to estimate the probability for this