Apparently not. From "The Origins of PostScript" mentioned by GP: > The architecture suggested by John Gaffney was to be based on a fictitious stack machine (a

Apparently not. From "The Origins of PostScript" mentioned by GP: > The architecture suggested by John Gaffney was to be based on a fictitious stack machine (at that time we had no knowledge of a similar approach taken by the Forth language). That is the only mention of "Forth".