The typical letter input device is (1). It is also one of the most common (2) devices. The keyboard has (3) for characters (letters, numbers and punctuation marks) and special (4). Pressing the keys tells the (5) what to do or what to write. The most widely used pointing (6) is the mouse. A mouse controls a (7) on the monitor which usually appears in the shape of an arrow. A mouse can have one, two or three (8), which are used to select command options and to control (9) presented on the (10).