`RUNOFF' is the predecessor of `roff'. I started a project `contrib/RUNOFF' with documentation. So far, it only contains 2 man-pages.
The file `runoff.man' has a large `hdtbl' table which looks vary nice in graphical `troff'. As `nroff' isn't supported by `hdtbl', an additional `tbl' had to be generated. The other man-page `groff_filenames.man' describes the file management since `RUNOFF'. Enjoy Bernd Warken