Contrast with "An implementation of the K5 interpreter." Or maybe others see them as one in the same? Of course from a performance and aesthetic perspective t

Contrast with "An implementation of the K5 interpreter." Or maybe others see them as one in the same? Of course from a performance and aesthetic perspective there is a world of difference between node.js and the tiny q/k interpreter from kx systems. On the other hand, the author's "Forth interpeter" in PostScript (Four.PS) is, at least from a reading standpoint, a thing of beauty. IMHO. Rightly or wrongly, I think of the PostScript interpreter as Forth-like, so I might be tempted to call Four.PS an implementation of the "Forth language", i.e., a small part of it.