This thing does math really really fast.

Cause it does math fast, we can use math to have it draw pictures like how you plot a graph.

These picture drawing math machines also talk to each other like a really fast phone call, all the time. So we can transfer pictures and words between them.

Also it makes phone calls but it doesn’t need a cable.

Also the pictures it can send are slowly eroding the foundations of our society like tides against a cliff, and we all feel the ground getting thinner beneath our feet, but if we turn off the water, like 5 people will be marginally less rich. And having 5 slightly less obscenely rich people is deemed unacceptable in our increasingly surreal society.

I think that’s a pretty good explanation for a person from the 50s

https://en.wikipedia.org/wiki/List_of_fictional_computers