Motorola SYMBOL MINISCAN MSXX04 - Manual (Page 245)

Glossary - 5
U.P.C. is often considered a 12-digit code. The 13th digit of EAN/U.P.C. symbol is a derived character in the left-most
position. In the case of U.P.C., this derived left-most character is a 0.
Element. Generic term for a bar or space.
Encoded Area. Total linear dimension occupied by all characters of a code pattern, including start/stop characters and data.
ENQ (RS-232). ENQ software handshaking is also supported for the data sent to the host.
Error Correction. A reader or decoder's use of mathematical schemes to reconstruct or replace damaged or missing
symbol characters to enable the reading of the symbol data.
Error-Correction Characters. Symbol characters used for error correction and detection, calculated automatically from the
other symbol characters.
Error-Correction Level. An indicator of the number of characters used in a symbology for error correction. A higher level
of error correction allows for correcting greater potential symbol damage.
Error Detection. This occurs when error-correction characters detect that the presence of errors in the symbol exceeds the
error correction capacity, and keeps the symbol from being decoded as erroneous data.
Error-Detection Characters. Symbol characters reserved for error detection that are calculated automatically from the
other symbol characters.
ESD. Electro-Static Discharge
F
Fixed Beam Bar Code Reader. A scanning device where scanning motion is achieved by moving the object relative to the
reader; as opposed to a moving beam reader.
G
GS1 DataBar. Formerly Reduced Space Symbology (RSS): A family of space efficient symbologies developed by
UCC.EAN.
Guard Bars. Bars located at both ends and the center of a UPC and EAN symbol to provide reference points for scanning.
H
Horizontal Bar Code. A bar code or symbol with an overall length dimension that is parallel to the horizon, which resembles
a picket fence.
Host Computer. A computer that serves other terminals in a network, providing such services as computation, database
access, supervisory programs and network control.