Hi folks, I used thack to typeset my dissertation on v7 circa 1988. It converts C/A/T codes to postscript. i have no idea if it will cope with eqn or pic but it was enough for nicely formatted text as i remember. this is the patch/bugfix with a link to the original package. https://www.tuhs.org/Usenet/comp.sources.misc/1989-July/001073.html -Steve