Barcode Guide
MSI Plessey
MSI Plessey (also known as Modified Plessey) is a numeric-only, variable-length symbology that is a variant of Plessey Code, which was originally developed by the Plessey Company of England in 1971.
MSI Data Corporation developed MSI Plessey to address the disadvantages of Plessey Code: it does not encode numbers efficiently, and it is one of the most error-prone of all barcode symbologies. The second check digit that MSI Data Corporation added as an option improved the code's reliability enough that MSI Plessey has continued to be used in specialty applications.
MSI Plessey has typically been used for inventory tracking, such as on the front edge of shelves in supermarkets and other warehouse environments to indicate where products are stored. It has also been used to identify storage containers.
MSI Plessey is currently maintained by Symbol Technologies, Inc.
Symbol Structure
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