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PostBar 
black-ink barcode system used by Canada Post in its automated mail sorting and delivery operations
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Subclass of barcode
Operator
Authority control
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PostBar (en); PostBar (ru) black-ink barcode system used by Canada Post in its automated mail sorting and delivery operations (en)

Media in category "Four-state barcodes"

The following 10 files are in this category, out of 10 total.