Huh? Could have fooled...well, everyone, including Chuck Moore.

Emphasis mine.

https://web.archive.org/web/20060101073958/http://www.colorf...

"The Data stack holds parameters for and results of subroutine calls. This distinction between control and data minimizes the cost of subroutine calls.

https://en.wikipedia.org/wiki/Forth_(programming_language)

"Forth is a procedural, stack-oriented programming language..."

"...where the user interacts via subroutines called words. "

"First a number (1 or 8) is pushed onto the stack, FLOOR5 is called,..."

"This is the same as what a processor's call/return instructions do."

https://www.forth.com/resources/forth-programming-language/

"The benefit of having a stack reserved for return addresses was that the other stack could be used freely for parameter passing, without having to be “balanced” before and after calls"

...