https://www.reuters.com/article/comcast-tv/comcast-walmart-team-up-to-sell-smart-tvs-with-the-media-firms-software-idUSKBN2H91U7 >(Reuters) -Comcast Corp has launched smart TVs that run on its operating system and will be sold in the United States at Walmart Inc stores and in the coming weeks at the retailer's website, the media giant said on Tuesday.