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Plessey
Plessey is a linear 1D barcode. The MSI
Plessey Code is is a pulse-width modulated non-self checking code.
Each character is represented by 4 bars; a narrow bar represents a
binary 0 and a wide bar represents a binary 1. The bars have the
binary weights 8-4-2-1. It is possible to encode the digits 0
through 9 and the letters A through F, although this code is most
often used just for numeric information. The start character is a
single wide bar, and the stop character is two narrow bars.
Uses:
Plessey is used in libraries, and is
often used for retail grocery shelf marking.
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