Abstract: A method of inputting characters and symbols on pattern element basis and a keyboard with over ten keys by means of which the characters and symbols are inputted. This input method and its keyboard can be used to input ASCII characters, Greek characters, Arabic characters, Japanese characters, Chinese characters as well as any other characters or symbols whose structure can be expressed as a combination of pattern elements, without changing the marks tagged on the key faces. It provides an easy to use, simple, general purpose and light in weight, small in size input device for computer, telephone, game machine or any digital system where a keyboard input is necessary.