When I was working in my first job, we had a big fast line printer and we discovered ASCII Art.
One of the guys who worked with me typed in the lines of text that were required for a fabulous (for the time!) picture of Snoopy:
My favourite picture was of Spock. Far too many characters for me to enter though!
I was reminded the other evening by a friend of a time when (in a subsequent job) he put up a piece of adult ASCII art over his desk and someone else (presumably taking offence at the content) took it down! You can see examples of that kind of art here.