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Wikipedia is the largest and most-read reference work in history. [3] [4] It is consistently ranked as one of the ten most popular websites in the world, and as of 2024 is ranked the fifth most visited website on the Internet by Semrush, [5] and second by Ahrefs. [6]
World War II [b] or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two major alliances: the Allies and the Axis powers. The vast majority of the world's countries, including all the great powers, fought as part of these military alliances. Many participating countries invested all available economic ...
Shapiro was a leading mathematician and computer scientist at the RAND Corporation think tank from 1959 until 1999. In the late 1960s and early 1970s Shapiro was the lead designer of one of the first computer-based mapping and cartography systems. In the 1970s Shapiro co-designed the MH Message Handling System. [3]
Tupac Amaru Shakur ( / ˈtuːpɑːk ʃəˈkʊər / TOO-pahk shə-KOOR; born Lesane Parish Crooks; June 16, 1971 – September 13, 1996), also known by his stage names 2Pac and Makaveli, was an American rapper. Considered to be one of the most influential and successful rappers of all time, [1] [2] academics regard him as one of the most ...
Michael Jeffrey Shapiro is an American composer, conductor, and author. He was born in Brooklyn, New York, and studied at Columbia College, Columbia University, the Mannes College of Music and the Juilliard School. [1] He has worked with musicians and performers including Teresa Stratas, Janos Starker, Marin Alsop, Sergiu Comissiona, Kim ...
The Shapiro reaction or tosylhydrazone decomposition is an organic reaction in which a ketone or aldehyde is converted to an alkene through an intermediate hydrazone in the presence of 2 equivalents of organolithium reagent. [1] [2] [3] The reaction was discovered by Robert H. Shapiro in 1967. [4] The Shapiro reaction was used in the Nicolaou ...
Carbon dioxide is a chemical compound with the chemical formula CO2. It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature, and as the source of available carbon in the carbon cycle, atmospheric CO 2 is the primary carbon source for life on Earth.
The Second Amendment ( Amendment II) to the United States Constitution protects the right to keep and bear arms. It was ratified on December 15, 1791, along with nine other articles of the Bill of Rights. [1] [2] [3] In District of Columbia v.