I am aware of the history of the term PC after the IBM PC, and I'm aware that the term Personal Computer has existed long before the IBM PC. However, what I don't know is if the abbreviation "PC" for "personal computer" was in common use before then.
Can anyone give me any evidence that it was or was not in common use, at least among computer enthusiasts, before this time?
I've Googled around but it's a difficult thing to search for. The Wikipedia page seems to imply that it was, but it's not sourced and is slightly ambiguous as to whether it's actually talking about the abbreviation, compared to the term.