yes it was fabulous strawberry mousse covered in choc - not dissimilar to a NZ Pinky bar
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a bar code or upc code (universal product code)
The rigid bar is not called a fulcrum! And, by the same token, why is the bar called a bar?
It might be possible to trace a product through a bar code, but it would depend on the product and the amount and type of data held in the associated computer network.
A data matrix bar code is used on almost very product which is found in stores. The data matrix bar code is used to identify a product and find the price in a computer system.
The first product to have a bar code included was a packet of Wrigley's Gum.