Bar Codes

A grocery store is where I first encountered bar codes.  Now bar codes seem to be everywhere.  This use is probably not new for many people, but it’s my first time to see bar codes on a for-sale sign in front of a house.   In this instance, a bar code has replaced an information flyer.    You have to have a “smart”” phone to read the bar code.  

It may take awhile to judge whether the bar code is as effective as a flyer.  Not everyone has a “smart” phone.

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