Ports in the copmuter

Port is a data travelling end in the computer with external devices like printers, scanners, cameras ,moderms etc...These ports are digitalized.There are two basic ports in the computer. These are serial ports and parallel  

ports.We can send number of signals at once through a parallel port according to its pin configuration.But in the serial port can send only one signal at once.

                       In here we have considered about parallel port for control electronic circuits.The parallel port we considered is in the back side of the computer.Some time it is called printer port.Because earlier most of printers has used that port.