Character and function key input device using dictionary order and use frequency

A character and function key input device, comprising:

• a character button unit including character buttons, each character button having one or more character or function key elements of one or more languages arranged thereon;
• a forward button for converting a character or function key element selected from the character or function key elements into an adjacent element arranged on a selected button or a button adjacent thereto based on a dictionary order, irrespective of whether the adjacent element is a character or a function key element;
• and
• a backward button for converting a character or function key element selected from the character or function key elements into an adjacent element arranged on a selected button or a button adjacent thereto based on a dictionary order, irrespective of whether the adjacent element is a character or a function key element,
• wherein the one or more character or function key elements arranged on the character button are adjacent to each other in the dictionary order, and a character or function key element having the highest use frequency is set as a basic value,
• wherein the dictionary order indicates a circular scheme that includes each of the character buttons on which said one or more character or function key elements are arranged and in which a first character element or a first function key element of the dictionary order is again exhibited subsequent to a last character element or a last function key element of the dictionary order,
• wherein other character or function key elements other than the character or function key element which is set as the basic value are converted from the selected character or function key element into the adjacent element, and
• wherein said other character elements or function key elements are converted irrespective of whether the adjacent element is arranged on the character button by pressing the forward button and backward button.