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Methylphenidate, sold under the brand names Ritalin (/ˈrɪtəlɪn/ RIT-ə-lin) and Concerta (/kənˈsɜːrtə/ kən-SUR-tə) among others, is a potent central nervous system (CNS) stimulant used medically to treat attention deficit hyperactivity disorder (ADHD) and, to a lesser extent, narcolepsy. It is a primary medication for ADHD (e.g. in ...
UNICEF (/ˈjuːniˌsɛf/ YOO-nee-SEF), originally called the United Nations International Children's Emergency Fund in full, now officially United Nations Children's Fund,[a] is an agency of the United Nations responsible for providing humanitarian and developmental aid to children worldwide.[3][4] The organization is one of the most widely ...
Viète. de Moivre. Euler. Fourier. v. t. e. In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles.
1985 Australian Grand Prix. Andreas Nikolaus " Niki " Lauda (22 February 1949 – 20 May 2019) was an Austrian racing driver and aviation entrepreneur. He was a three-time Formula One World Drivers' Champion, winning in 1975, 1977 and 1984, and is the only driver in Formula One history to have won a championship for both Ferrari and McLaren ...
Sir Charles Spencer Chaplin KBE (16 April 1889 – 25 December 1977) was an English comic actor, filmmaker, and composer who rose to fame in the era of silent film. He became a worldwide icon through his screen persona, the Tramp, and is considered one of the film industry's most important figures. His career spanned more than 75 years, from ...
International Monetary Fund Abbreviation IMF Formation 27 December 1945; 78 years ago () Type International financial institution Purpose Promote international monetary co-operation, facilitate international trade, foster sustainable economic growth, make resources available to members experiencing balance of payments difficulties, prevent and assist with recovery from international financial ...
Sir Richard Charles Nicholas Branson (born 18 July 1950) is an English business magnate. [1] In the 1970s, he co-founded the Virgin Group, which today controls more than 400 companies in various fields. [2] [3] [4] Branson expressed his desire to become an entrepreneur at a young age. His first business venture, at the age of 16, was a magazine ...
