AP: If you are out shopping you might to have the RedLaser app on your phone. One that I've used the most is ShopSavvy. Both are free, I think.
These apps and others let you scan in a barcode and compare prices. I like ShopSavvy because it will read the barcode quickly. Some apps are slow.
For example scan the barcode on a book, and compare Barnes and Noble, Amazon, etc.
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