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Glossary GL-9
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.).
Tolerance Allowable deviation from the nominal bar or space width.
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.
Visible Laser Diode (VLD) A solid state device which produces visible laser light.
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.
Wireless Wide Area Network (WWAN) See WAN.
WNMP (Wireless Network Management Protocol) This is Symbol’s
proprietary MAC layer protocol used for inter access point
communication and other MAC layer communication.