Effy 3.1 Input System is the keypad-type input method, which is developed by TimeSpaceSystem Co., Ltd. The keypad interface is similar to that of the existing mobile phone. The input method is such that alphabets, the minimum unit of a language, are decomposed into figures according to the formative principle of each language. A user can input a letter by compounding the figures on the keypad in the order he writes the letter.