This is a little strange, considering that it wasn’t long ago that Dennis Ritchie died, but I just learned that John McCarthy has died. Like Ritchie, his wasn’t a household name (unless your household happens to be full of computer geeks), but he also made a number of contributions which changed the nature of computing. He coined the term “artificial intelligence”, invented the LISP programming language, and even anticipated a number of very contemporary network-based technologies such as web-based applications and cloud computing.