Buzz Anderson lays out the history of one of the most beloved/hated tools in every developer’s tool belt:

The concept of a regular expression has a surprisingly interesting history that dates back to the optimistic, mid-20th Century heyday of artificial intelligence research.

The term itself originated with mathematician Stephen Kleene. In 1943, neuroscientist Warren McCulloch and logician Walter Pitts had just described the first mathematical model of an artificial neuron, and Kleene, who specialized in theories of computation, wanted to investigate what networks of these artificial neurons could, well, theoretically compute.