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| waehere pae (The special identification code printed as a set of vertical bars of differing widths on books, grocery products, and other merchandise. Used for rapid, error-free input in such facilities as libraries, hospitals, and grocery stores, bar codes represent binary information that can be read by an optical scanner. The coding can include numbers, letters, or a combination of the two; some codes include built-in error checking and can be read in either direction) | |||
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⇒ barcode (alternative, less common spelling of barcode  merriam-webster.com) | |||
| A printed machine-readable code that consists of parallel bars of varied width and spacing | |||