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870s Establishments
87 may refer to: * 87 (number) * one of the years 87 BC, AD 87, 1987, 2087, etc. * Atomic number 87: francium * Intel 8087 The Intel 8087, announced in 1980, was the first x87 floating-point coprocessor for the 8086 line of microprocessors. The purpose of the 8087 was to speed up computations for floating-point arithmetic, such as addition, subtraction, multiplicati ..., a floating-point coprocessor See also * * List of highways numbered {{Numberdis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
87 (number)
87 (eighty-seven) is the natural number following 86 and preceding 88. In mathematics 87 is: * the sum of the squares of the first four primes (87 = 22 + 32 + 52 + 72). * the sum of the sums of the divisors of the first 10 positive integers. * the thirtieth semiprime, and the twenty-sixth distinct semiprime and the eighth of the form (3.q). * 5! - 4! - 3! - 2! - 1! = 87 In sports * Cricket in Australia holds 87 as a superstitiously unlucky score and is referred to as "the devil's number." This originates from the fact that 87 is 13 runs short of a century. 187, 287 and so on are also considered unlucky but is not as common as 87 on its own. * In the National Hockey League, Wayne Gretzky scored a league-high 87 goals with the Edmonton Oilers in the 1983–84 NHL season. In other fields Eighty-seven is also: *The atomic number of francium. *An answer to a popular puzzle question states 16, 06, 68, 88, xx, 98. The answer is 87 when looked upside down. *The number of years betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
87 BC
__NOTOC__ Year 87 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Octavius and Cinna/Merula (or, less frequently, year 667 ''Ab urbe condita'') and the Second Year of Houyuan. The denomination 87 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Republic * Lucius Cornelius Cinna is elected consul of Rome, thus returning the rule of Rome back to the populares faction. * Sulla arrives in Greece and besieges Athens. He orders Lucius Licinius Lucullus to raise a fleet from Rome's allies around the eastern Mediterranean. * Ostia is razed by Gaius Marius as he comes back from Africa with an army to take Rome by force. China * March 29 – Emperor Wu of Han dies after a 54-year reign in which he leads the Han dynasty (China) through its greatest expansion. The Empire's borders span from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AD 87
AD 87 ( LXXXVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Saturninus (or, less frequently, year 840 ''Ab urbe condita''). The denomination AD 87 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * The Roman Julius Maternus explores western Africa (approximate date). * Lyon, a city in Gaul, has a population of over 100,000 citizens (approximate date). * Sextus Julius Sparsus gains power in the Roman Senate (approximate date). Europe * Decebalus becomes king of Dacia. Births * Pothinus, bishop of Lyon Lyon,, ; Occitan: ''Lion'', hist. ''Lionés'' also spelled in English as Lyons, is the third-largest city and second-largest metropolitan area of France. It is located at the confluence of the rivers Rhà ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1987
File:1987 Events Collage.png, From top left, clockwise: The MS Herald of Free Enterprise capsizes after leaving the Port of Zeebrugge in Belgium, killing 193; Northwest Airlines Flight 255 crashes after takeoff from Detroit Metropolitan Airport, killing everyone except a little girl; The King's Cross fire kills 31 people after a fire under an escalator flashes-over; The MV Doña Paz sinks after colliding with an oil tanker, drowning almost 4,400 passengers and crew; Typhoon Nina strikes the Philippines; LOT Polish Airlines Flight 5055 crashes outside of Warsaw, taking the lives of all aboard; The USS Stark is struck by Iraqi Exocet missiles in the Persian Gulf; U.S. President Ronald Reagan gives a famous speech, demanding that Soviet leader Mikhail Gorbachev tears down the Berlin Wall., 300x300px, thumb rect 0 0 200 200 Zeebrugge disaster rect 200 0 400 200 Northwest Airlines Flight 255 rect 400 0 600 200 King's Cross fire rect 0 200 300 400 Tear down this wall! rect 300 200 6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2087
In contemporary history, the third millennium of the anno Domini or Common Era in the Gregorian calendar is the current millennium spanning the years 2001 to 3000 ( 21st to 30th centuries). Ongoing futures studies seek to understand what is likely to continue and what could plausibly change in the course of this period and beyond. Predictions and forecasts not included on this timeline * List of future astronomical events ** List of lunar eclipses in the 21st century ** List of solar eclipses in the 21st century * Projections of population growth * Climate change ** Representative Concentration Pathway ** Shared Socioeconomic Pathways * Extinction * List of dates predicted for apocalyptic events * Predictions and claims for the Second Coming * Near future in fiction * Works falling into the public domain in the United States 21st century 2000s * See: 2001 * 2002 * 2003 * 2004 * 2005 * 2006 * 2007 * 2008 * 2009 2010s * See: 2010 * 2011 * 2012 * 2013 * 2014 * 2015 * 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francium
Francium is a chemical element with the symbol Fr and atomic number 87. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine). The isotopes of francium decay quickly into astatine, radium, and radon. The electronic structure of a francium atom is n7s1, and so the element is classed as an alkali metal. Bulk francium has never been seen. Because of the general appearance of the other elements in its periodic table column, it is presumed that francium would appear as a highly reactive metal, if enough could be collected together to be viewed as a bulk solid or liquid. Obtaining such a sample is highly improbable, since the extreme heat of decay resulting from its short half-life would immediately vaporize any viewabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel 8087
The Intel 8087, announced in 1980, was the first x87 floating-point coprocessor for the 8086 line of microprocessors. The purpose of the 8087 was to speed up computations for floating-point arithmetic, such as addition, subtraction, multiplication, division, and square root. It also computed transcendental functions such as exponential, logarithmic or trigonometric calculations, and besides floating-point it could also operate on large binary and decimal integers. The performance enhancements were from approximately 20% to over 500%, depending on the specific application. The 8087 could perform about 50,000 FLOPS using around 2.4 watts. Only arithmetic operations benefited from installation of an 8087; computers used only with such applications as word processing, for example, would not benefit from the extra expense (around $150) and power consumption of an 8087. The 8087 was an advanced IC for its time, pushing the limits of manufacturing technology of the period. Initi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
