Sorry I'm late seeing your comment, but I'll tell you what I know for posterity. I heard the story third-hand: a prior manager of mine, Mark "The Red" Harlan (of Clarus the dogcow fame), used to be a DTS manager at Apple back in the late 80's/early 90's. He also hosted a MC'd at WWDC each year called "Stump the Experts," where the audience got to challenge a panel of Apple engineers with the most obscure questions possible. One audience member asked about this PostScript command, and one of the engineers admitted to the fax-in burrito order form. Sorry I don't remember the engineer's name or which WWDC year, but I'll ping Mark.