The key feature of multiple values is that each value gets passed back to the caller on the stack, not the heap. So they don't cons garbage the way returning a

The key feature of multiple values is that each value gets passed back to the caller on the stack, not the heap. So they don't cons garbage the way returning a list or struct would. This is a natural thing to do in assembly language. Common Lisp just makes it available in a high level language.