A variant sequence with an additional note, G-E'-C'-G, known as "the fourth chime", was used during significant events of extreme urgency (including during World War II, especially in the wake of the December 1941 attack on Pearl Harbor; on D-Day and during disasters). The NBC chimes were mechanized in 1932 by Rangertone founder Richard H. Ranger; their purpose was to send a low-level signal of constant amplitude that would be heard by the various switching stations manned by NBC and AT&T engineers, and to be used as a system cue for switching individual stations between the Red and Blue network feeds. Contrary to popular legend, the G-E'-C' notes were not originally intended to reference to the General Electric Company (an early shareholder in NBC's founding parent RCA and whose Schenectady, New York radio station, WGY, was an early affiliate of NBC Red). The three-note sequence remains in use by the NBC television network, most notably incorporated into the John Williams-composed theme music used by NBC News, "The Mission" (first composed in 1985 for NBC Nightly News).

NBC has thirteen owned-and-operated stations and nearly 200 affiliates throughout the United States and its territories, some of which are also available in Canada via pay-television providers or in border areas over-the-air; NBC also maintains brand licensing agreements for international channels in South Korea and Germany . [2]

They have an ancient legacy but every Olympics features new athletes and events that keep the Games current and fresh. Here's a look at what will be new at the PyeongChang Winter Olympics.

  • File:NBC logo.svg
  • NBC Wins the 2013-14 Primetime Television Season
  • ... , networks are announcing changes to their line-ups, especially NBC
  • Image Nbc News Logo Download
  • NBC announced its 2014-2015 schedule today and includes a mid-season ...
  • NBC UNIVERSAL LOGOS — Pictured: NBC News Color Logo — NBC ...
  • rhys meyers dracula nbc nbc dracula nbc dracula series nbcu ...
  • Image - NBC logo.png | Memory Alpha | Fandom powered by Wikia
  • NBC Logos | Flickr - Photo Sharing!
  • NBC (@nbc) | Twitter
  • Nbc icon by SlamItIcon on deviantART
  • NBC Clinches First Full Season Win in 10 Years
  • NBC images NBC HD wallpaper and background photos (324558)
  • NBC Makes Play for '24' - 24 Spoilers
  • Nbc Peacock 2012 Nbc officially released their
  • WKYC's Director's Cut with Frank Macek: NBC News & Notes: 9/26/12
  • How to Watch NBC Online & Live Streaming
  • ER TV Show -
  • nbc Biggest Loser, Biggest Loser
  • File:NBC logo 2011.png - Wikipedia
  • NBC's First-to-Fourth Free Fall - Hollywood Reporter
  • NBC Peacock | dragon's mous tache
  • Displaying 19> Images For Nbc Universal Logo 2012...
  • NBC News Reports on Skincerity | The Skincerity Revolution
  • File:NBC logo 2011.svg - Wikipedia, the free encyclopedia
  • Nbc Peacock Logo 2013 Nbc-peacock-logo-wide
  • NBC Olympics | Shows | NBC Sports Pressbox
  • NBC Cancels NBC
  • Nbc Logo Png Me up on nbc
  • pay tv subscribers who live in cities with nbc owned affiliates as nbc
  • NBA on NBC broadcasting teams
  • File:NBC logo (Halloween).svg - Wikimedia Commons
  • Co.Design: How has graphic design changed since your career began?
  • NBC officially kicked off Network Upfront week this morning by ...
  • NBC was Formed, 1926 | History/Herstory
  • Dr. Ratey
  • Dora Madison Burge for Felix Magazine © Chicago ...
  • Jokes of the Week: 02/13/17 - The Tonight Show
  • Colin Quinn Stand-Up - The Tonight Show
  • Michelle Pfeiffer Met Ruth Madoff Before Playing Her On ...
  • Renée Zellweger Teaches Jimmy Her Seventh Grade Tryout ...
  • Internet: A New Frontier
  • Dirty+War.jpg
  • Daniella Guzman -- March 21-28, 2013 | Hi-Def News Caps
  • The Farrelly Brothers, Drew Barrymore and Jimmy Talk Fever ...
  • Animal Facts with Robert Irwin: European Legless Lizard ...
  • Amy Sedaris Is Obsessed with Beard Wigs - The Tonight Show
  • Educação Continuada
  • Buy Music — Anthony Riley Music
  • Reifen-Service Akyüz – Felgen