Post #4168810

I’ve seen punch cards where the optical media meant to be illuminated and projected for people to see, was accompanied by punched information for a computer to read. They were both on the same punch card. I want to say the USGS, the patent office, the army, and maybe Bell systems used these at some points? I think this may be what you remember? I’ve never seen one where the holes carried a few extra bits of color information though. I do not think that existed on an industrial scale. Was it in a niche children’s toy?