[boygobbo]

This looks very similar to me to the mainframe manuals I am familiar with from this time which were written using SCRIPT/VS as the printer control language & GML (which begat SGML) as the document markup language (implemented as SCRIPT/VS macros). There was also SCRIPT/PC for DOS but that was very limited by comparison and a pain to use so I doubt they used that. (SCRIPT/VS is quite like Troff - they share a common ancestor in RUNOFF.)

[ruslan]

Thanks for sharing. Googling for "SCRIPT/VS" gives the only link pointing to somewhere in the middle of IBM's z/OS manual. Must be a lost alien technology by now.

[boygobbo]

There's a Wikipedia page[1] which covers the general background and a copy of the SCRIPT/VS Text Programmer's Guide[2] (which was my bible back in the day) on archive.org, which should give you a pretty good overview.

[1] https://en.wikipedia.org/wiki/SCRIPT_(markup) [2] https://archive.org/details/bitsavers_ibm370DCFSpositionFaci...