Honeywell 2020 - Manual (Page 107)

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UPC A Number System
The numeric system digit of a U.P.C. symbol is normally transmitted at the
beginning of the scanned data, but the unit can be programmed so it will not
transmit it.
Default = On.
UPC A Addenda
This selection adds 2 or 5 digits to the end of all scanned UPC A data.
Default = Off for both 2 Digit and 5 Digit Addenda.
UPC A Addenda Required
When Addenda Required is set to on, the image scanner will only read UPC A
barcodes that have addenda.
Default = Not Required.
Off
* On
* 5 Digit Addenda Off
5 Digit Addenda On
* 2 Digit Addenda Off
2 Digit Addenda On
* Not Required
Required