G–14
Glossary
Publication 2755-6.4
U
UPC
Universal Product Code. A relatively complex numeric symbology.
Each character consists of two bars and two spaces, each of which
can be any of four widths. The standard symbology for retail food
packages in the United States.
V
Visible Laser Diode (VLD)
A solid state device which produces visible laser light. Laser light
emitted from the diode has a wavelength of 670 to 680 nanometers.
X
X-Dimension
Width of the narrowest element (bar or space) in a bar code symbol.
Y
Y-Dimension
Element height, as applied to a two-dimensional symbology, which
must equal or exceed a required minimum.
Z
Zero-Suppressed Code
A version of UPC/EAN which reduces the number of characters in
the code. The resulting code combines the manufacturer’s code and
the product’s code of Version A in a retail application.
