Walmart Corp.'s (WMT) story is one of success as the company ascended from Sam Walton's single store in Rogers, AK. in 1962 to the largest retailer in the world.

Walmart's insistence on keeping prices low has drawn criticism from outsiders who say that the company's practices have resulted in depressed employee wages and the shuttering of mom and pop stores that can not compete with their prices.

In spite of all the criticism, the one group that seems to love Walmart is the most important group, its customers.

Here are some of the innovations that have helped Walmart become a world renowned brand.

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