Glossary - 8 MC31XX Series Mobile Computer User Guide
Symbol Length. Length of symbol measured from the beginning of the quiet zone (margin) adjacent to the start character
to the end of the quiet zone (margin) adjacent to a stop character.
Symbology. The structural rules and conventions for representing data within a particular bar code type (e.g. UPC/EAN,
Code 39, PDF417, etc.).
T
Tolerance. Allowable deviation from the nominal bar or space width.
U
UPC. Universal Product Code. A relatively complex numeric symbology. Each character consists of two bars and two
spaces, each of which is 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.
W
WAN. Wide-Area Network. A radio network that supports data communication beyond a local area. That is, information can
be sent across a city, state, or even nationwide.
Warm Boot. A warm boot restarts the mobile computer by closing all running programs. All data that is not saved to flash
memory is lost.
Wireless Local Area Network (WLAN). See LAN.
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