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A combination between a whiteboard and a cork bulletin board Original early 1960s ad for "Plasti-slate", the first whiteboard/dry erase board invented by Martin Heit. It has been widely reported that Korean War veteran and photographer Martin Heit and Albert Stallion, an employee at Alliance, a leading flat rolled steel sheet supplier should be credited with the invention of the whiteboard in ...
Stick-slip effect with a chalk on a blackboard. Chalk sticks are produced in white and in various colours, especially for use with blackboards. White chalk sticks are made mainly from calcium carbonate derived from mineral chalk or limestone, while coloured chalk sticks are made from calcium sulphate in its dihydrate form, CaSO 4 ·2H 2 O, derived from gypsum.
Apr 1950: US SEAC (Standards Eastern Automatic Computer) demonstrated at US NBS in Washington, DC – was the first fully functional stored-program computer in the U.S. May 1950: UK The Pilot ACE computer, with 800 vacuum tubes, and mercury delay lines for its main memory, became operational on 10 May 1950 at the National Physical Laboratory ...
In 1958, Jack Kilby at Texas Instruments invented the hybrid integrated circuit (hybrid IC), [1] which had external wire connections, making it difficult to mass-produce. [2] In 1959, Robert Noyce at Fairchild Semiconductor invented the monolithic integrated circuit (IC) chip. [3] [2] It was made of silicon, whereas Kilby's chip was made of ...
1970, 1989 Allen, Frances E. Developed bit vector notation and program control-flow graphs; first female IBM Fellow (1989); first female recipient of the ACM's Turing Award (2006). 1954, 1964, 1967 Amdahl, Gene: Pioneer of mainframe computing; designed IBM 704; chief architect of IBM System/360.
Timeline of computing presents events in the history of computing organized by year and grouped into six topic areas: predictions and concepts, first use and inventions, hardware systems and processors, operating systems, programming languages, and new application areas.
The spirit duplicator invented in 1923 and sold by Ditto, Inc., used two-ply "spirit masters" or "ditto masters". The top sheet could be typed, drawn, or written upon. [citation needed] The second sheet was coated with a layer of colored wax. The pressure of writing or typing on the top sheet transferred colored wax to its back side, producing ...
Pascal invented his machine in 1642. In 1642, while still a teenager, Blaise Pascal started some pioneering work on calculating machines and after three years of effort and 50 prototypes [18] he invented a mechanical calculator. [19] [20] He built twenty of these machines (called Pascal's calculator or Pascaline) in the following ten years. [21]