... unit 6 keyboard and mouse I- keyboard A set of keys that represent the letters of the alphabet, numbers and symbols ... which are arranged on a flat board and are connected ... computers have 1 keyboard port, 1 video port, 2 serial ports, 1 parallel port, Some also have a mouse port. If there is no mouse port, a serial mouse must be used... 3. The mouse port and the keyboard ... Move the mouse to the left and the cursor moves to the left 2. The mouse contains a a rubber coated ball 3. There are 2axles inside the mouse and two interrupter wheels 4. When you move the mouse. ...