See a new article regarding the evolution of the NBC peacock: http://create.adobe.com/2017/8/25/what_you_can_learn_from_the_evolution_of_the_nbc_logo_.html
A sleek, stylish, and strikingly simple peacock evolved from a detailed illustration into a forceful and flexible symbol. The colors of the logo represent the tonal spectrum of color television. Together, they symbolize the contribution of every member of the corporate family. Separately, they give each division a distinct, individual identity.
The peacock and the NBC name offer quick, easy corporate identification and a bright, familiar face for every facet of the company’s business, whether on the air or on the road. Over 25 years later the Peacock remains as distinctive, identifiable and contemporary as when it was first introduced. The standards manual has eliminated any disparities in design style and ensured a consistent level of quality across NBC’s advertising, design and promotion departments.