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The results of a tabulation are electrically coupled with a sorter while displayed on clock-like dials. The concept of automated data processing had been born. In 1890, Herman Hollerith invented the mechanical tabulating machine, a design used during the 1890 Census which stored and processed demographic and statistical information on punched ...
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War
The Radio Corporation of America (RCA) leads the music format with 45 RPM records, later to conquer the market for cheap players. The first publication in Germany in this format appears 1953rd; The British physicist Dennis Gabor (1900–1979) invents holography. This method of recording and reproducing image with coherent light allows three ...
1900: The first Zeppelin is designed by Theodor Kober. 1901: The first motorized cleaner using suction, a powered "vacuum cleaner", is patented independently by Hubert Cecil Booth and David T. Kenney. [455] 1903: The first successful gas turbine is invented by Ægidius Elling. 1903: Édouard Bénédictus invents laminated glass.
1930: Subrahmanyan Chandrasekhar discovers his eponymous limit of the maximum mass of a white dwarf star; 1931: Kurt Gödel: incompleteness theorems prove formal axiomatic systems are incomplete; 1932: James Chadwick: Discovery of the neutron; 1932: Karl Guthe Jansky discovers the first astronomical radio source, Sagittarius A
Throughout the 1920s and 1930s, industrial, university, and military research continued to realize gains in the power, maneuverability, and reliability of airplanes: Charles Lindbergh completed a solo non-stop transatlantic flight in 1927, Wiley Post flew around the world in nine days in 1931, and Howard Hughes shattered flight airspeed records ...
December 9 – Joseph Needham (died 1995), English biochemist and writer on the history of science and technology in China. December 12 – Mária Telkes (died 1995 ), Hungarian-American scientist and inventor.
March 5 – Danish painter Einar Wegener begins to undergo sexual reassignment surgery in Germany and takes the name Lili Elbe.; July 10 – Mental Treatment Act 1930 in the United Kingdom provides for free voluntary treatment for psychiatric conditions and for psychiatric outpatient clinics, replaces the term "asylum" with "mental hospital" and reorganises the Board of Control for Lunacy and ...