The world's largest retailer

the world's largest retailer Best Buy Co. said it plans to offer free online shipping on certain items through Dec. 21, following a similar move by Wal-Mart Stores Inc. earlier this month.

The electronics retailer said Wednesday its offer is valid on "hundreds of thousands" of items, including all CDs, Blu-Ray and DVD movies and gaming software and accessories. Some items, such as Apple Inc.'s iPads, laptop computers and major appliances are not included.

Wal-Mart, the world's largest retailer, plans to provide free shipping on more followed than 60,000 online items during the holidays without the need for a minimum purchase or subscription plan.