@amszmidt Remove that ‘a’ and then it’s fine. There’s neither a Forth, nor a Lisp. Both language families, I suppose, have similar ideals, but executed in extremely different manner. I can not exactly recall who put it this way, but I’ll borrow a part of their words and sentiment in the following: Forths are Lisps with empathy towards the machine, and Lisps are Forths with respect towards the theory. This is why I think the families of languages are used in different domains and rarely interact with each other; like two independent civilizations (“ecosystems”) with little trade or travel between them.