Related Clues:

• QR kin
• Proof-of-purchase letters
• Supermarket scanner's target, briefly
• Scannable bars on mdse
• Supermarket lines, for short?
• Lines scanned at checkout, for short
• Checkout IDs
• Bars scanned by checkers
• Scanned ID on a pkg
• Scannable ID in a market
• Inventory tracking aid, briefly