@Crud3_Gamer @avs I would guess it was probably less used in Denmark, at least I never saw one or recall hearing about it. We had a danish manufacturer of PCs (named Piccolo and Piccoline) which we had some installation when I was in the gymnasium (83-86).
I do remember seeing ABC computers, in 81 or or 82, I was doing a brief internship (a school arrangement) at a local company who used these to lay text on videos.
The Compis project started already back in 1981 and was sold between 1983-88 when it was discontinued.
The choice of the Danish COMAL as the main programming language of the Compis was partly made to impress Danish schools and that managed to get it some initial interest but finally when the Piccoline was introduced between 1984-89 it was a big reason for Compis not making it in Denmark.
Eventually both computers failed due to cheap PC-clones!
Yes the Compis main operating system for a standalone computer was CP/M-86 or for a server setup with workstations (like in a school) it used Concurrent CP/M-86 but later they also released MS-DOS 3.2 for it in standalone mode so it was technically MS-DOS compatible but not IBM compatible.
In some schools in Sweden they used Microbee’s instead that ran standard CP/M on a Zilog Z-80 as it had access to more software than was available for CP/M-86!