This advertisement is from 1957. The text of the ad is reprinted below:

"Telephones are ubiquitous?"
"Yes, telephones are ubiquitous"

Robert Day, the well-know cartoonist who drew this picture, was a little afraid there might be some people who wouldn't know what we meant by ubiquitous. "It's a pretty big word," he said.

"Don't worry," we told him. "We'll just put in a little reminder that the dictionary says ubiquitous means 'existing or being everywhere at the same time.'"

There's surely no better way to describe telephones! They're not only in millions of homes and offices but just about everywhere you go. In stores and at gas stations! At airports, bus depots and railroad stations! Out-of-doors!

Throughout the country, there are hundreds of thousands of these public telephones for your convenience.

So the next time something comes up when you're away from home or the office, or there's some news you'd like to share with someone, just stop up to one of those nearby telephones and call.

You can save yourself a lot of running around, be a number of places in a few minutes, and get things settled while they are fresh in your mind.

Working together to bring people together...BELL TELEPHONE SYSTEM

---