25 Things That Could Only Happen at Walmart

Let's start with technology. Wal-Mart pushed the retail industry to establish the universal bar code, which forced manufacturers to adopt common labeling. The bar allowed retailers to generate all kinds of information -- creating a subtle shift of power from manufacturers to retailers. Wal-Mart became especially good at exploiting the information behind the bar code and is considered a pioneer in developing sophisticated technology to track its inventory and cut the fat out of its supply chain.