Comcast Corp.'s deal to buy the rest of NBCUniversal would end General Electric Co.'s long ties with the broadcast network. Comcast now owns 51 percent, and GE the remaining 49 percent. Comcast expects to get full ownership by the end of March.
Here's a look at some key events in NBC's history:
1926 — National Broadcasting Co. formed by General Electric Co., Westinghouse Electric Co. and Radio Corporation of America after buying broadcast assets from AT&T. Launches first permanent radio network in United States.
1931 — Experimental TV broadcasts begin from atop Empire State Building.
1939 — NBC begins regular television broadcasts in New York, with opening of World's Fair.
1947 — "Meet the Press" premieres.
1948 — Comic Milton Berle becomes first television star on "Texaco Star Theater"
1948 — Television ownership reaches 1 million.
1950 — Trademark granted for three-note NBC chimes.
1952 — Launch of "Today," first network early-morning news show.
1962 — Johnny Carson becomes "Tonight" host.
1964 — NBC broadcasts its first Olympic Games.
1975 — "Saturday Night Live" debuts.
1984 — "The Cosby Show" debuts, becomes TV's biggest hit.
1989 — "Seinfeld" debuts.
1994 — "ER" and "Friends" debut, making NBC's Thursday "must-see TV."
1995 — Network launches NBC.com.
2002 — NBC acquires Spanish-language broadcaster Telemundo and entertainment cable network Bravo.
2007 — Jeff Zucker named president and chief executive.
2011 — The Federal Communications Commission and the Justice Department approve Comcast's takeover of NBC Universal with conditions intended to prevent it from keeping NBC programming to itself at the detriment of other cable operators and video websites. NBC Universal loses the space in its name to become NBCUniversal.
2012 — NBC airs the Summer Olympics, held in London. While it expected to take a loss on the coverage given the high costs, it breaks even with ratings up compared with the Beijing Games in 2008. And NBC begins showing clear signs of a comeback, improving ratings after nearly sliding into irrelevancy over the previous decade.
Sources: NBC, AP research