William Kahan

William Morton Kahan is a Canadian mathematician and computer scientist, professor emeritus at the University of California, Berkeley, known as the father of floating point for his role as the primary architect of the IEEE 754-1985 standard for floating-point computer arithmetic, which brought consistency and reliability to numerical computation across computer hardware. Kahan developed the Kahan summation algorithm, a technique for minimizing the accumulated rounding error when adding a long sequence of finite-precision floating-point numbers, and he created Paranoia, a widely used benchmark program for testing computer systems for floating-point arithmetic bugs. He earned his PhD in mathematics from the University of Toronto in 1958 and later joined the faculty at Berkeley, where he continued research into numerical analysis and the reliability of scientific computation. Kahan received the ACM Turing Award in 1989 for his fundamental contributions to numerical analysis and was inducted into the National Academy of Engineering in 2005.