Okay, so you know how when you want to tell your computer to do something, you have to use a special language like typing on a keyboard or clicking on icons? Lisp is one of those languages, but it's special because it only uses a few simple rules to make things happen.
A Lisp machine is a kind of computer that's really good at understanding and running Lisp programs. It's like a super smart helper that can do lots of things really fast. Instead of using a keyboard or mouse to interact with a Lisp machine, you talk to it in Lisp code.
Lisp machine Lisp is just the specific version of Lisp that these special computers understand. It's a way of writing programs that takes advantage of the unique features of Lisp machines to make them run as efficiently as possible. It's like using a special tool that's perfectly designed for a specific task.
So think of it like this: Lisp is like a magic wand that can make your computer do anything you want, and Lisp machine Lisp is like a spell that only certain special computers can understand, but when they do, they can do some really amazing things for you.