dual-tone signaling
51Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
52international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …
53American Sign Language grammar — The grammar of American Sign Language (ASL) is the best studied of any sign language, though research is still in its infancy, dating back only to William Stokoe in the 1960s. Stokoe was the first linguist to approach any sign language as a full… …
54Native American music — Introduction music of the indigenous peoples of the Western Hemisphere. The Americas contain hundreds of native communities, each with its own distinctive history, language, and musical culture. These communities although united in placing… …
551ESS switch — The Number One Electronic Switching System, the first large scale Stored Program Control (SPC) telephone exchange or Electronic Switching System in the Bell System, was introduced in Succasunna, New Jersey, in May 1965[1]. The switching fabric… …
56endocrine system, human — ▪ anatomy Introduction group of ductless glands (gland) that regulate body processes by secreting chemical substances called hormones (hormone). Hormones act on nearby tissues or are carried in the bloodstream to act on specific target organs… …
57Voice over IP — Digital voice redirects here. For the commercial service, see Comcast Digital Voice. Voice over Internet Protocol (Voice over IP, VoIP) is a family of technologies, methodologies, communication protocols, and transmission techniques for the… …
58Insulin — This article is about the insulin protein. For uses of insulin in treating diabetes, see insulin therapy. Not to be confused with inulin. Insulin Computer generated image of six insulin molecules assembled in a hexamer, highlighting the threefold …
59Heavy metal music — Heavy metal Stylistic origins Blues rock, psychedelic rock Cultural origins Late 1960s, United Kingdom and United States Typical instruments Electric guitar • bass guitar • drums • vocals • keyboards …
60Fife (musical instrument) — A fife is a small, high pitched, transverse flute that is similar to the piccolo, but louder and shriller due to its narrower bore. The fife originated in medieval Europe and is often used in military and marching bands. Someone who plays the… …
