87 may refer to: *

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. * ...

* one of the years

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 denomi ...

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 condi ...

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, k ...

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 l ...

, etc. * Atomic number 87:

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&nb ...

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