<human>:  Why is it called Common Lisp?
<bot>: It’s called Common Lisp because it is a common language. Lisp is a family of languages that are all related. They share a common ancestor, called Lisp 1.0, and they are all descendants of Lisp 1.0. Common Lisp is the most popular Lisp, and is used for a variety of purposes. It is used to write software in the fields of artificial intelligence, data science, and web development.