Kroger Co. and Microsoft Corp. are joining forces to bring the ease of online shopping to brick-and-mortar grocery stores.

Kroger, America’s biggest supermarket chain, has remodeled two stores to test out the new features, which include “digital shelves” that can show ads and change prices on the fly along with a network of sensors that keep track of products and help speed shoppers through the aisles. Kroger could eventually roll out the cloud-based system it developed with Microsoft in all of its 2,780 supermarkets.

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