signalling point code
81CDC 6600 — The CDC 6600 was a mainframe computer from Control Data Corporation, first delivered in 1964. It is generally considered to be the first successful supercomputer, outperforming its fastest predecessor, IBM 7030 Stretch, by about three times. It… …
82Flag signals — can mean any of various methods of using flags or pennants to send signals: Flaghoist signalling or the flaghoist signalling system uses sets of flags and pennants to convey messages. The U.S. Navy uses a set of 68 flags, including flags for each …
83Special information tones — In telephony, a special information tone (SIT) is an international standard three beep signal indicating a call did not go through and usually precedes a recorded announcement explaining the problem.[1] As the SIT is well known in many countries …
84History of the Ming Dynasty — The History of the Ming Dynasty (zh cp|c=明朝|p=Míng Cháo) covers a period including its rule as the dynasty of China from 1368 to 1644, following the collapse of the Mongol led Yuan Dynasty. At its height, the Ming Dynasty had a population of 160… …
85Toll-free telephone number — A toll free, Freecall, Freephone, or 800 number is a special telephone number, in that the called party is charged the cost of the calls by the telephone carrier, instead of the calling party. The cost of the call to the called party is usually… …
86Deal railway station — Deal Deal station is little changed from when it was built in 1847 (May 2011) …
87Cabot Tower (Newfoundland) — Cabot Tower was built in 1897 to commemorate the 400th anniversary of John Cabot s discovery of Newfoundland, and Queen Victoria s Diamond Jubilee. It is located on top of Signal Hill overlooking the city of St. John s, Newfoundland and Labrador …
88Extensible Messaging and Presence Protocol — (XMPP) is an open, XML inspired protocol originally aimed at near real time, extensible instant messaging (IM) and presence information (a.k.a. buddy lists), but now expanded into the broader realm of message oriented middleware. [Citation |… …
89Types of radio emissions — The International Telecommunication Union uses an internationally agreed system for classifying radio frequency signals. Each type of radio emission is classified according to its bandwidth, method of modulation, nature of the modulating signal,… …
90List of IEC standards — In order to distinguish standards published by the International Electrotechnical Commission numerically from other international standards, their number range was shifted in 1997 by adding 60000. So what used to be called IEC 27 is now… …
