DB-25 Connector:
The original parallel port in a computer was a 36 pin interface developed by Centronics, a printer manufacturer. This was the standard port for connecting printers to the computer. However, when IBM introduced its personal computer it used a new parallel port which was called DB-25.
DB-25 has 25 pins and this is the standard port on any IBM compatible computer. Now, the Centronics interface is used only on printers. A special printer cable is needed to connect printer to the computer and this is available as a standard accessory.
