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ISO 
(International Organization for Standardization): A network of the national standards 
institutes of several countries producing world-wide industrial and commercial standards. 
LED (Light Emitting Diode) 
A low power electronic light source commonly used as an indicator light. It uses less power 
than an incandescent light bulb but more than a Liquid Crystal Display (LCD). 
LED Illuminator 
LED technology used as an extended lighting source in which extra optics added to the chip 
allow it to emit a complex radiated light pattern. 
Matrix Symbologies (2D Codes) 
An arrangement of regular polygon shaped cells where the center-to-center distance of 
adjacent elements is uniform. Matrix symbols may include recognition patterns which do not 
follow the same rules as the other elements within the symbol. 
Multidrop 
A communication protocol for connecting two or more readers in a network with a 
concentrator (or controller) and characterized by the use of individual device addresses. 
Multi-row (or Stacked) Symbologies 
Symbologies where a long symbol is broken into sections and stacked one upon another 
similar to sentences in a paragraph. 
RAM 
Random Access Memory. Data in RAM can be accessed in random order, and quickly 
written and read. 
Symbol Verification 
The act of processing a code to determine whether or not it meets specific requirements. 
Transmission Control Protocol/Internet Protocol (TCP/IP) 
A suite of standard network protocols that were originally used in UNIX environments but are 
now used in many others. The TCP governs sequenced data; the IP governs packet 
forwarding. TCP/IP is the primary protocol that defines the Internet.