Are you sure? Your earlier comments expressed uncertainty if it was WordPerfect at all.

WordPerfect on the PC was a very niche app before version 4.2 which was the big hit. I knew a tiny handful of places that had copies of the older version but they weren't running it.

It is on the edge of before my time -- I started my first job in late 1988 -- but before WP 4.2, WordStar still dominated, with some specialist users running DisplayWrite or MultiMate. I'm not American and I think the US market was different with shareware taken slightly more seriously, so more presence of PC Write, and maybe XyWrite or other tools little seen in the British Isles.