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  2. Elo rating system - Wikipedia

    en.wikipedia.org/wiki/Elo_rating_system

    The Elo [a] rating system is a method for calculating the relative skill levels of players in zero-sum games such as chess. It is named after its creator Arpad Elo, a Hungarian-American physics professor. The Elo system was invented as an improved chess-rating system over the previously used Harkness system, [1] but is also used as a rating ...

  3. Enjoy 50% off a Sam's Club annual membership today - AOL

    www.aol.com/lifestyle/sams-club-membership-deal...

    $25/per year $50 Save $25 As a Sam's Club member, you'll get access to thrifty bulk buys (hello, paper towels and toilet paper!) and exclusive discounts on everything from furniture to electronics.

  4. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    The mesosphere is the third highest layer of Earth's atmosphere, occupying the region above the stratosphere and below the thermosphere. It extends from the stratopause at an altitude of about 50 km (31 mi; 160,000 ft) to the mesopause at 80–85 km (50–53 mi; 260,000–280,000 ft) above sea level.

  5. Great Depression - Wikipedia

    en.wikipedia.org/wiki/Great_Depression

    Unemployed people lined up outside a soup kitchen in Chicago. The Great Depression (1929–1939) was a severe global economic downturn that affected many countries across the world. It became evident after a sharp decline in stock prices in the United States, leading to a period of economic depression. [1] The economic contagion began around ...

  6. Biden's big inflation problem: Prices are now up nearly 20% ...

    www.aol.com/finance/bidens-big-political-problem...

    Prices did then rise after Biden's inauguration and reached 9.1% — but that peak came in June 2022 after Biden had been in office for over a year. The latest data, which came out Wednesday after ...

  7. Human Development Index - Wikipedia

    en.wikipedia.org/wiki/Human_Development_Index

    The Human Development Index ( HDI) is a statistical composite index of life expectancy, education (mean years of schooling completed and expected years of schooling upon entering the education system ), and per capita income indicators, which is used to rank countries into four tiers of human development. A country scores a higher level of HDI ...

  8. Rayon - Wikipedia

    en.wikipedia.org/wiki/Rayon

    Rayon, also called viscose [1] and commercialised in some countries as sabra silk or cactus silk, [2] is a semi-synthetic fiber, [3] made from natural sources of regenerated cellulose, such as wood and related agricultural products. [4] It has the same molecular structure as cellulose.

  9. McDonnell Douglas F-15 Eagle - Wikipedia

    en.wikipedia.org/wiki/McDonnell_Douglas_F-15_Eagle

    The McDonnell Douglas F-15 Eagle is an American twin-engine, all-weather tactical fighter aircraft designed by McDonnell Douglas (now part of Boeing ). Following reviews of proposals, the United States Air Force (USAF) selected McDonnell Douglas's design in 1969 to meet the service's need for a dedicated air superiority fighter.

  10. Boeing 787 Dreamliner - Wikipedia

    en.wikipedia.org/wiki/Boeing_787_Dreamliner

    The Boeing 787 Dreamliner is an American wide-body airliner developed and manufactured by Boeing Commercial Airplanes . After dropping its unconventional Sonic Cruiser project, Boeing announced the conventional 7E7 on January 29, 2003, which focused largely on efficiency. The program was launched on April 26, 2004, with an order for 50 aircraft ...

  11. Marks & Spencer - Wikipedia

    en.wikipedia.org/wiki/Marks_&_Spencer

    Marks and Spencer plc (commonly abbreviated to M&S and colloquially known as Marks or Marks & Sparks) is a major British multinational retailer based in London, England, that specialises in selling clothing, beauty products, home products and food products. It is listed on the London Stock Exchange (LSE) and is a constituent of the FTSE 100 Index .