In 1951 – Jay Forrester filed a patent application for matrix core memory. Professor Forrester led a team at MIT that developed a three-dimensional magnetic structure code-named Project Whirlwind. It was the first random access memory that was practical, reliable and relatively high-speed.
In 1979 – Daniel Bricklin and Robert Frankston gave the first demonstration of VisiCalc, the program that made the Apple II popular with businesses.
In 1997 – Deep Blue won its final match against Chess master Garry Kasparov, becoming the first computer to defeat a chess champion in match play.