Home > 80 (number)

80 is the natural number following 79 and preceding 81. It is a Harshad number.

• Greek numeral: π´
• See wiktionary:eighty to see 80 in other languages.

Eighty is also:

• the atomic number of mercury (Hg)
• the number of units in a four score
• the age at which one becomes an octogenarianAn octogenarian is a person in the age group of 80 to 89 years old. An octogenarian of today is born between , 1914 and , 1924. In most countries of the world, living octogenarians have all surpassed their average life expectancy. In a few countries, such
• in the title of Around the World in Eighty DaysAround the World in Eighty Days Le tour du monde en quatre-vingt jours is a classic adventure novel by Jules Verne, first published in 1872. In the story, English adventurer Phileas Fogg, and his newly employed butler, Passepartout, attempt to circumnavig by Jules VerneJules Verne ( February 8, 1828 March 24, 1905) was a French writer and a pioneer of the science fiction ( scientific romance) genre. Early years Verne was born in Nantes to attorney Pierre Verne and his wife Sophie. The oldest of the family's five childre
• the model number of the computers TRS-80This article is about the Tandy TRS-80 computer. For the Chicago-based electronica group called TRS-80, see TRS-80 (group). TRS-80 (also affectionately or derisively known as the "Trash-80") was the designation for several lines of microcomputer systems p, IBM 80The IBM 80 Electric Punched Card Sorting Machine, was introduced by IBM in 1925. This sorter was almost twice the speed of the older IBM 70 sorter and used an entirely new magnetically operated horizontal sorting design. At the close of 1943, IBM had 10,2, Sinclair ZX80The Sinclair ZX80 was a home computer brought to market in 1980 by Sinclair Research. It was notable for being the first computer available in the United Kingdom for under a hundred pounds (a pricetag of £99. 95, to be exact). It was available in kit form, and Aster CT-80The Aster CT-80 an early home/ personal computer developed by the small Dutch company MCP (later renamed to Aster Computers , was sold in its first incarnation as a kit for hobbyists. Later it was sold ready to use. It consisted of several Eurocard PCB's
• the model number of:
  • T-80, a Soviet tank
  • IAR 80, a Romanian WWII fighter aircraft
  • McDonnell Douglas MD-80, Arado Ar 80, and F-80 Shooting Star
• part of the name of the bands Eighty-D and Eighty Proof Soul
• the age limit for cardinals to vote in papal elections
• the percentage of work done with 20% of the resources according to a " 80-20 rule"
• the length of a beach in Western Australia: Eighty Mile Beach
• the length of the Eighty Years' War or Dutch revolt (1568-1648)
• the number of the French department Somme
• the designation of Interstate 80, a freeway that runs from California to New Jersey; the European route E80 from Lisbon to Gürbulak
• the standard TCP/IP port number for HTTP connection
• the 80A, 80B and 80C photographic filters correct for excessive redness under tungsten lighting
• The ISBN Group Identifier for books published in the Czech Republic and Slovakia.
• The year AD 80, 80 BC, or 1980.