The who and the what?
"CP/M & IBM. It's hard to imagine one without the other." It's hard to imagine one without the other?! Today it's hard to imagine either—for their names are now all but meaningless.
The advertising copy surely made sense in the March 1983 premier issue of PCWorld, but now CP/M is a long-forgotten OS, and the IBM brand name is about as relevant as Buick and Woolworths to the vast majority of modern consumers.
Fun fact: In the second column of its ad copy, Digital Research published its public phone number. To what end? To contact a sales associate on stand-by? To chat with the CEO? Oh, the 1980s were such innocent times.