Those are text mode DOS programs and used whatever font was in the graphics card’s character ROM. Perhaps you’re thinking of IBM’s CGA or EGA fonts, which were somewhat similar.
They were all similar in a lot of ways. There are only so many ways you can draw the Latin alphabet in an 8x8 grid. There were plenty of variants to be sure, with different baselines, serif vs sans, kinda of descenders, and all that. Still, it’s inevitable that several are going to look similar.
But Topaz was a Commodore font, and I’m sure no other OS distributed it.
