AT&T Wednesday announced thirteen companies which are participating in an AT&T WorldNet
charter advertising preview. They include Delta Air Lines; J.C. Penney Co.; MasterCard International; Discovery Channel; Duracell; Adobe Systems; Hearst New Media HomeArts; the National Basketball Association; MCA/Universal; Frontier Technologies; 1-800-Flowers; Cox Communications' Atlanta Games site; and Sony Electronics. Charter advertisers pay $30,000 for one million guaranteed impressions between May and July. However, charter advertisers will receive special discounts throughout 1996, receive co-marketing opportunities and will get the month of April free for advertising.