Triangle Publications

Triangle Publications Inc. was an American media group based first in Philadelphia, and later in Radnor, Pennsylvania. It was a privately held corporation, with the majority of its stock owned by Walter Annenberg and his sisters. Its holdings consisted of newspapers, magazines, and radio stations. After nearly two decades of divestiture, it was folded into News Corporation in 1988.

Triangle was formed by Walter Annenberg in 1947 from the assets and properties of the Cecelia Corporation, a company founded by his father, Moses Annenberg, and named for his mother, Sarah "Sadie" Cecelia Annenberg. Cecelia Corporation's assets at the time included the Daily Racing Form, the Morning Telegraph in New York, and The Philadelphia Inquirer. It came to own numerous other publications, including Armstrong Daily; the Philadelphia Daily News; Seventeen magazine; TV Guide magazine; Good Food magazine; and Official Detective magazine; as well as television and radio stations including WFIL AM-FM-TV in Philadelphia; WLYH-TV in Lancaster and Lebanon, Pennsylvania; WFBG AM-FM-TV in Altoona and Johnstown, Pennsylvania; WNHC AM-FM-TV in New Haven, Connecticut; WNBF AM-FM-TV in Binghamton, New York; and KFRE AM-FM-TV in Fresno, California. Triangle owned cable TV operations in various regions including Suburban Cable TV Co. in suburban Philadelphia, Empire State Cable TV Co. in New York, and New Haven Cable TV Co. in Connecticut. It also owned ITA Electronics, a broadcasting equipment manufacturer based in Lansdowne, Pennsylvania; McMurray Printers, a small job press printer in Miami; McMurray Publishing Co., Ltd, which published the Canadian editions of TV Guide; Triangle Circulation, which handled the nationwide distribution of Triangle's magazines, as well as those of other publishers; and Educasting, a developer of educational programming.