![]() ![]() While hardware keyboard wedges have become rare (most barcode scanners today connect via USB and appear as a human interface device), this very flexible concept still exists in the form of a virtual keyboard wedge (a.k.a. This allowed the barcode scanner to be used with any application that accepted keyboard inputs. As far as the computer was concerned, there was no difference between a key pressed on the keyboard and one sent by the barcode scanner. ![]() Codes scanned by the barcode reader could thereby be transmitted as keystrokes. In the days before USB, bar code readers often came with a hardware keyboard wedge, a little device which allowed both a keyboard and the barcode reader to be connected to the keyboard port (PS/2) of a PC.
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