Thanks for mentioning that; I'd never heard of it. Very interesting. A query: it seems to have been written with access to a set of manuals for the various early versions of Research Unix. The Unix Tree: http://minnie.tuhs.org/cgi-bin/utree.pl has the manual pages for V3 and V4, and V6 and later, but not the other ones. Do the manuals used for the preparatio of that note still exist; and, if so, is there any chance of getting them scanned? (I have a auto-page-feed scanner, and volunteer to do said scanning. Someone else is going to have to do the OCR, and back-conversion to NROFF source, though... :-) Noel