three-channel transmission system
21Continuous Tone-Coded Squelch System — In telecommunications, Continuous Tone Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two way radio communications channel. It is sometimes called tone squelch. Where more… …
22Mutual Broadcasting System — Type Cooperative radio network (1934–52); corporate controlled radio network (1952–99) …
23nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
24English Channel — For the racehorse, see English Channel (horse). Satellite view of the English Channel The English Channel (French: la Manche, Breton: Mor Breizh, Cornish: Mor Bretannek), often referred to simply as the Chann …
25Clear Channel Communications — Not to be confused with clear channel radio stations, a type of AM radio station. This article is about the broadcasting company. For other uses, see Clear channel. CC Media Holdings, Inc. Type Private Industry …
26Fox News Channel — Fox News redirects here. For other uses, see Fox News (disambiguation). Not to be confused with Fox News Radio and local news bulletins on the Fox Network Affiliates. Fox News Channel …
27405-line television system — The 405 line monochrome analogue television broadcasting system was the first fully electronic television system to be used in regular broadcasting. It was introduced with the BBC Television Service in 1936, suspended for the duration of World… …
28digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
29Global Positioning System — GPS redirects here. For other uses, see GPS (disambiguation). Geodesy Fundamentals …
30Sound reinforcement system — A sound reinforcement system is an arrangement of microphones, electronic signal processors, amplifiers, and loudspeakers that makes live or pre recorded sounds usually music or speech louder, or that distributes the sound to a larger or more… …
