Decoder / Delineator / Digital / Discrete

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Decoder

A circuit or a device to translate digital signals of barcodes with appropriate algorithm, and send upward to the computer through its interface.

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Delineator

1 module bars of supplementary code of UPC Add-on version, inserted between each characters.

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Digital

To display the numerical value with non-continuous graduations or indices.

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Discrete

Discrete type is one of the code type of barcode.
The last space character doesn't have a meaning (as a white bar), it is treated merely as a gap. (See continuous code type)