Entertainment Weekly plans to include barcodes in its upcoming summer movie preview issue that, when scanned by a reader with a smartphone, will bring up trailers for the 20 movies featured in the issue. The trailers are hosted by YouTube and employ a special barcode developed by Microsoft that will also appear in the magazine's advertisements. Mediaweek , which reported the magazine's plans on Thursday, said that EW , a Time Inc. publication, plans to provide advertisers with data on the barcode feature from a third-party firm, AdMeasure, which will track the number of people who responded to the barcodes in the ads and articles with their smartphones.