call-confirmation signal
51British absolute block signalling — The principle of the British absolute block system of railway signalling is to facilitate the safe operation of a railway by preventing more than one train from occupying a defined section of route at the same time. This system is used on double… …
52Joseph Smith, Jr. — Joseph Smith, Jr. (December 23, 1805 – June 27, 1844) was the founder of the Latter Day Saint movement, also known as Mormonism, and an important religious and political figure in the United States during the 1830s and 1840s. In 1827, Smith began …
53Smoke detector — A smoke detector is a device that detects smoke, typically as an indicator of fire. Commercial, industrial, and mass residential devices issue a signal to a fire alarm system, while household detectors, known as smoke alarms, generally issue a… …
54Singlish — Spoken in Singapore Language family Creole Singlish Language codes ISO 639 3 …
55Digital television transition — The digital television transition is the process in which analog television broadcasting is converted to and replaced by digital television. This primarily involves both TV stations and over the air viewers; however it also involves content… …
56Neuroscience of free will — refers to recent neuroscientific investigations shedding light on the question of free will, which is a philosophical and scientific question as to whether, and in what sense, rational agents exercise control over their actions or decisions. As… …
57Beagle 2 — Infobox Spacecraft Name = Beagle 2 Caption = Beagle 2 as it would have looked on Mars Organization = ESA Major Contractors = Mission Type = Lander Satellite Of = Mars Orbital Insertion Date = December 25, 2003 Launch = June 2 2003 Launch Vehicle …
58Local number portability — This article is about telephone number portability on landlines. For telephone number portability on mobile phones, see Mobile number portability. Local number portability (LNP) for fixed lines, and full mobile number portability (FMNP) for… …
59Futurology — Futures Studies, Foresight, or Futurology is the science, art and practice of postulating possible, probable, and preferable futures and the worldviews and myths that underlie them. Futures studies (colloquially called Futures by many of the… …
60Deep Throat — This article is about the Watergate informant. For the pornographic film, see Deep Throat (film). For other uses, see Deep Throat (disambiguation). Deep Throat is the pseudonym given to the secret informant who provided information to Bob… …
