Rockwell Automation 2755 AdaptaScan Software - Manual (Page 216)

G–11
Publication 2755-838
symbol length
The length of the symbol measured from the beginning of the quiet
area adjacent to the start character to the end of the quiet area
adjacent to the stop character.
symbology
The conventions, or rules, which govern the formation of characters
and strings of characters in a bar code symbol.
symbology identifier
An optional three character code which may prefix transmitted data
from a bar code reader indicating the symbology read and any
options enabled in the reader or special features of a symbology
encountered (presence of FNC 1 in Code 128).
T
tag
A collection of information associated with a single variable or I/O
point.
two-width symbology
A bar code symbology whose bar and spaces are characterized
simply as wide or narrow. Codabar, Code 39, and Interleaved 2 of 5
are examples of two-width symbologies.
U
UPC
Acronym for Universal Product Code. The standard bar code type
for retail food packaging in the United States.
V
void
The undesirable presence of an area of high reflectance in a bar.
W
window
A display area that the users interacts with to operate a tool.