Possible Clues:

• Checkout lines
• Fish in plain lines at the supermarket?
• It's read at registers
• Some Tesco-read bands to decipher?
• Supermarket lines?
• Readable arrangement of lines, apart from chapter and verse
• No jeans perhaps if you want a drink from product lines?
• It stores information about retail costs, primarily in black lines
• It's needed for self-checkout
• Supermarket lines