A:\ Was IIRC a DOS thing. I am not sure about CPM. Or whatever a PET ran.
I remember CP/M and even Apple had a Z80/CPM card along with the 80 column card you put in to run CPM programs.
So I had to look it up and then wow, I remember PIP !
https://www.howtogeek.com/718124/what-was-cpm-and-why-did-it-lose-to-ms-dos/