I asked Brian Kernighan if he had recollections and/or documents from the early days of nroff.
Hi, Mike -- All of the roff programs originate from Jerry Saltzer's Runoff, done for CTSS. [nt]roff was unusual in having programmable layout (the trap mechanism). I don't recall any place where this was all written down in an orderly fashion, though it's interesting and maybe some enthusiast could take it on. Maybe Doug McIlroy remembers -- he did a roff-like program, as did I, and several others. Brian -- Mike Bianchi Foveal Systems 973 822-2085 mbian...@foveal.com http://www.AutoAuditorium.com http://www.FovealMounts.com