Here's one for the older stackoverflow participants (are there any? you don't have to admit it ;-) ) or for computer history buffs.
When I was in school in the '70s, where I went to school we had a big gym, lots of sports fields, but very few computers. For a while we had a teletype to some time-sharing system, and later, a Wang 2200S. What I want to ask about, though, is another computer that we had on loan for a while. I've never been able to find anyone who remembers it, and I can only describe it, as follows.
It was a digital computer of sorts -- not an analog computer. It was about 6 feet tall and 6 feet wide. (OK, I was much shorter then, so maybe I remember it larger than it was.) Its output display was two rows of red lights horizontally across the front of the machine near the top. Below that was its input interface, a patch panel, I think two rows (maybe more) of sockets. And of course it came with a collection of patch cords that you would plug in in different patterns to "program" the machine. "Applications" were limited to causing the display to show different moving patterns of the lights. Like getting a vertical pattern of lights, like a colon ':' to move from left to right across the display of lights. Or in reverse. Or oscillate -- start at the left, move to the right, and then turn around and come back. All by which patch cords you hooked up.
The school looked for a little-used room with enough space, and the ability to support the user traffic, which was about 1 or 2 kids out of a school of several hundred. They ended up putting it in the gym teacher's office off the gym, which was not occupied full time by any means, and was just a few steps away from the math room.
The computer stayed on loan to us for a number of months, and I programmed the heck out of it at any free moment. Then it was given back and I never heard from it again, nor anyone who had seen anything by that description.
Have you? If you have, who was the manufacturer? Model numbers? Links to images? Anything ...