National Barcode Day (6/26)

It all started with a pack of Wrigley’s chewing gum in 1974.
Today use barcodes on just about everything.
Check out this one for some bad dad jokes.
(yeah, the barcode works to find my daily dose of smiles)
An example?  
Why do Swedish warships have barcodes?
So when they enter port, they can Scandinavian.