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MSI/Plessey

The MSI bar code is used most often in the grocery industry for shelf labels This is a

numeric-only code that stands up well to wear and tear This code is not self checking, and

so a checksum is required It supports three types of checksums

2D Bar Code Symbologies

A 2D (two-dimensional) bar code symbology allows vast amounts of data on a single bar code by storing data in 2 dimensions

A common demonstration of the technology is a single bar code no larger than a standard UPC bar code that contains the

entire Gettysburg Address Some common 2D bar code symbologies include PDF-417, Code 49, DataMatrix Code, and MaxiCode

Symbology Summary Table

The table below summarizes the different characters of the various bar code symbologies:

Length Checksum* Characters** Notes

Code 39 Any NR N, U, P Most common bar code

Code 128 Any AUTO N, U, L, P, C Best for full ASCII character set

Interleaved 2 of 5 any RECMD N Most dense numeric code

UPC A 12 AUTO N Grocery standard

UPC E 8 AUTO N Small packages

EAN/JAN 13 13 AUTO N International grocery standard

EAN/Jan 8 8 AUTO N Small packages

Ext 39 Any NR N, U, L, P, C Lowercase/ Ctrl-very wide

Codabar Any NR N, P Requires start / stop (A, B, C, or D)

MSI/Plessey 3-16 AUTO N Very durable

Code 93 any AUTO N, U, P, L Higher density Code 39

* Checksum: AUTO = Automatic Checksum - Always Required; NR = Checksum not required - Self-checking; RECMD = Checksum highly recommended

** Characters Encoded: N = Numbers (0-9); U = Uppercase (A-Z); L = Lowercase (a-z); P = Punctuation; C= Control Characters (<32)

Reduced Space Symbology (RSS)

The New RSS (Reduced Space Symbology) family contains three linear symbologies to be used with the EAN/UCC System

RSS-14®: RSS-14® encodes the full 14-digit EAN/UCC item identication in a linear symbol that can be scanned omni-

directionally by suitably programmed point-of-sale scanners It also has truncated and stacked formats An early application

of RSS-14 Stacked Omni will be for marking fruits and vegetables

RSS Limited®: RSS Limited® encodes a 14-digit item EAN/UCC item identication with Packaging Indicators of zero or one

in a linear symbol for use on small items that will not be scanned at the point-of-sale An early application of RSS Limited

will be for marking small healthcare items

RSS Expanded®: RSS Expanded® encodes EAN/UCC item identication plus additional Application Identier strings such

as weight and “best before” date in a linear symbol that can be scanned omni-directionally by suitably programmed point-

of-sale scanners RSS Expanded can also be printed in multiple rows as a stacked symbol when the normal symbol would

be too wide for the application An early application of RSS Expanded will be for marking meats and other variable measure

perishables

Figure 13 - MSI/Plessey Symbology

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