NBC Peacock

The National Broadcasting Company (NBC) has used several corporate logos over the course of its history. The first logo was used in 1926 when the radio network began operations. Its most famous logo, the peacock, was first used in 1956 to highlight the network's color programming. While it has been in use in one form or another for all but four years since then, the peacock did not become part of NBC's main logo until 1979 and did not become the network's sole logo until 1986. The logos were designed by NBC itself. The first logo incorporated design from parent company RCA, and was a unique logo not related to the NBC radio network.

Recent logos have been themed for different holidays during the year (such as Halloween, Valentine's Day and New Year's Day), in observance of its upcoming or ongoing broadcasts of the Olympics, as well as an American flag-themed logo in the wake of the events of the September 11 terror attacks. The logo has been adapted for color television and high definition as technology has advanced. As NBC acquired other television channels, the logo branding was adopted to other networks including: CNBC, NBCSN, MSNBC, Golf Channel, and Comcast SportsNet. The logo was also incorporated into the corporate emblem of the network's parent company, NBCUniversal, until Comcast took control of the company in 2011. Since December 10, 2012, the peacock has been integrated into the corporate logo of Comcast.

NBC debuted as a radio network in 1926, with a logo depicting a microphone surrounded by lightning bolts, superimposed over a map of the United States of America. The "NBC" letters appeared in an arc above the graphic images.

...
Wikipedia