Glossary — Letter D

A circuit or device that translates the digital signals of barcodes using an appropriate algorithm, and sends the result to the computer through its interface.

A 1-module bar of the supplementary code in the UPC Add-on version, inserted between each character.

To display a numerical value using non-continuous graduations or indices.

Discrete type is one of the code types of barcode.
The last space character has no meaning (as a white bar); it is treated merely as a gap. (See continuous code type)