In addition to a focus on its broad retail operation, Walmart keeps tabs on threats with its Global Security Operations ...

With these distribution centers, Walmart seeks to stay ahead of changes in technology at the 4,600 Walmart stores, according to a news release. It is now the largest grocery retailer in the U.S.

Walmart says its use of honeycomb-style map segments is helping expand same-day delivery. More accurate maps enable the company to reach 12 million more households in the US.