Key events in Comcast Corp.'s history:
1963 - Ralph Roberts, former marketer of Muzak and owner of a belt and suspenders company, starts Comcast with 1,200-subscriber community antenna television system in Tupelo, Miss.
1969 - American Cable Systems is renamed Comcast and incorporated in Pennsylvania.
1972 - Roberts takes Comcast public.
1990 - Son Brian Roberts, after working his way up through various posts, becomes president and pursues vigorous expansion.
1996 - Comcast completes $1.49 billion acquisition of E.W. Scripps Co.'s cable television operations, raising its total subscribers to 4.3 million.
1996 - Comcast announces $520 million deal to buy majority ownership of Spectacor, owner of the Philadelphia Flyers, the 76ers and the Spectrum and Corestates Center, the city's two indoor sports arenas.
2001 - After acquiring rival cable systems including Jones Intercable and Lenfest Communications, Comcast grows to nation's third largest cable operator with more than 8 million subscribers.
2002 - Comcast completes acquisition of AT&T's cable division for about $29 billion in stock to become the nation's largest cable operator with more than 20 million subscribers, nearly twice as many as second-place AOL Time Warner.
Feb. 11 - Proposes to buy media and entertainment powerhouse Walt Disney Co., owner of ABC and ESPN television networks, movie studios and theme parks, for about $54 billion in stock.