This appears to be the opening page in an article from the December 1982 issue of Electronic Fun Computers (or possibly the "Computers" section of Electronic Fun). The text reads:
Dial M For MODEMI long for this idyllic age of proto-computing in which it was possible to "play all the games", and in which the receiver of a standard personal telephonic device was an important component of your MOdulator-DEModulator.
You've uncrated your machine, mastered BASIC and taken over the family TV set. But what do you do once you've played all the games and tried your hand at a few elementary graphic designs? You get a modem. Then - with the help of your telephone - you're ready to tap into remote databases and shop at Saks, research the family tree, play new video games and find out what the weather's like in Tanzania - without leaving your easy chair. The fun of personal computing has just begun.
I'm also amused by how the computer comes in a crate, and the hypothetical operator is suggested to have mastered the BASIC programming language before hooking the computer up to a screen. This is a literal depiction of early 80s computing and not at all narrative licence.
For those who are interested, I've drawn this from a Flickr pool of similarly archaic early 1980s computing posters. There are lols to be had from its inspection.
Now if you'll excuse me, I have to go tap into some remote databases. Possibly in Tanzania. Possibly.
EDIT: Actually, I have to give this article props for spelling modem entirely in lowercase. They were well ahead of the literary crowd at a time when most people were busy reminding you that MODEM is a (stupid-ass) acronym.