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Glossary
G-9
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UPC
Universal Product Code. A numeric, 12-digit bar code symbology used extensively in
retail, particularly the grocery industry.
User-Defined Characters (UDC)
See
graphic.
User-Defined Fonts (UDF)
See soft font.
variable data field
Bar code and text fields that change from one label to the next.
XON/XOFF protocol
A protocol that stops the host from sending data when the printer buffer fills up and
starts it again when the buffer empties.