2D Symbologies; 2D Stacked Symbologies - Intermec EasyCoder 4420 User Manual

Appendix A — Specifications

2D Symbologies

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Supported Bar Code Symbologies (continued)
Symbology Description
POSTNET The Postal Numeric Encoding Technique (POSTNET) uses binary
digits, represented as full bars and half bars, to provide a numeric bar
code symbology that is easily read and decoded by optical reading
systems. POSTNET provides both error detection and correction
capabilities.
UPC Universal Product Code (UPC) is a subset of EAN. It is a fixed length,
numeric, continuous symbology employing four element widths. Two
common types of UPC are Version A, which encodes 12 digits, and
Version E, which encodes 6 digits. UPC has been used in the
supermarket industry since 1973. UPC supplemental code is intended
for only periodical issue numbers.
2D symbologies provide a more efficient way of encoding data than
standard bar code symbologies. 2D symbologies use two dimensions to
hold data instead of one, allowing much more information to be stored in
a smaller amount of space. The printer can print both stacked and matrix
2D symbologies.

2D Stacked Symbologies

2D stacked symbologies consist of short linear segments stacked on top of
each other. In addition to being able to condense a large amount of
information into the stacked format, PDF417 provides an extensive error
detection and correction option. Up to 510 characters can be recovered if
they are lost due to an error in scanning or if the label is damaged. 2D
stacked symbologies can be scanned with a laser scanner or imaging device
that features 2D code scanning capability.
Supported 2D Stacked Symbologies
Symbology Description
Code 16K Introduced in 1988, Code 16K is an alphanumeric symbology similar
to Code 49 in that it employs multiple rows (from 2 to 16). Each row
is fixed length and uses a mirror image of the Code 128 coding
patterns.
Code 49 Code 49 is an alphanumeric symbology developed in 1987 as a means
of labeling very small objects. A Code 49 bar code contains from two
to eight adjacent rows, each separated by a one-module separator bar.
EasyCoder 4420 and 4440 Bar Code Label Printer User's Manual