Computer port is a kind of point or connection face. The system unit of the computer has the connection points of keyboards , mice , speakers , scanners etc. This connection point is called port . Ports can be of different types. E.g. Parallel Port Serial Port USB Port VGA or Monitor Port VGA or Monitor Port Keyboard Port Mouse Port Mouse Port Networking Port Audio Port Audio Port) Video Port ( Video Port) Game Port ( Game Port) MIDI Port PS / 2 Port