New York—The New York Times Co. said Wednesday that ad revenue in May for the company’s business units rose 4.4%, while total company revenue in May increased 4%. Ad revenue for the New York Times Media Group, which includes the flagship New York Times, NYTimes.com, International Herald Tribune, IHT.com and WQXR-FM, rose 5.6%. National advertising increased as strength in transportation/travel, telecommunications and American fashion ads offset weakness in studio entertainment, national automotive and corporate advertising. The Times Co.’s electronic products continue to generate double-digit ad growth. Internet revenue increased 26.9% in May compared with May 2005, fueled by robust growth in both display and classified advertising. Ad revenue for About.com, the bloglike Web site Times Co. acquired in early 2005, rose 59% due to a significant increase in cost-per-click advertising.