A cell holds some datum (like "Q" and all its associations) and a pointer is something that can reference another cell, for example ("Q", <rest of alphabet afte

A cell holds some datum (like "Q" and all its associations) and a pointer is something that can reference another cell, for example ("Q", <rest of alphabet after Q>) includes a pointer to the rest of the alphabet after "Q". This (datum <ptr to the rest>) pair is exactly the LISP list, usually written as s-expressions.