The type of serial interface used for POS hardware products is called a RS232 connection. This interface type will connect a serial barcode scanner to your POS computer via a DB9 serial interface. Serial interface barcode scanners are the rarest type, so be sure to double check it is what you need before purchasing one.
If you need more help choosing the correct interface type for your barcode scanner, please see our interface buying guide. And if you are still unsure, simply give us a call. It would be great to hear from you.