Provided is an overloaded keypad layout which is efficient, ergonomic, unambiguous, intuitive to operate, and also familiar to the average user in its letter arrangement. More particularly, the overloaded keypad layout comprises four rows, and a space-key is positioned in the third row from bottom, and is QWERTY-like its letter arrangement. Further, the multitap input method or selector (select-the-next-letter key) input method may be employed to disambiguate the overloaded keypad layout.