QR Codes are Reinventing Bar Codes

Qr codes are like a bar code, but it is a link! I found out that many company's are starting to use them. When you scan a Qr code it could explain the product, how much it weights, size, and if it is food ingredients could also be found on it!
Here are exaple that QR codes are found on....
Phones
Computers
food
Books
Soda bottles