Ivan Sutherland, The American computer scientist and Internet pioneer has received the Turing Award from the Association for Computing Machinery in 1988 for his invention of Sketchpad, an early predecessor to the sort of graphical user interface that has become ubiquitous in personal computers today.
On November 20, 1924, French American mathematician Benoite B. Mandelbrot was born. Mandelbrot worked on a wide range of mathematical problems, including mathematical physics and quantitative finance, but is best known as the popularizer of fractal geometry. He was the one who coined the term 'fractal' and described the Mandelbrot set named after him.