Some of these must have taken a great deal of time to produce! :o
https://www.asciiart.eu/comics/alfred-e-neuman (https://www.asciiart.eu/comics/alfred-e-neuman)
Remember these from my time in the Navy and Air Force.
We had them on punced tape Punched tape - Wikipedia (https://en.wikipedia.org/wiki/Punched_tape) (used in RTTY Radioteletype - Wikipedia (https://en.wikipedia.org/wiki/Radioteletype) and TTY Teleprinter - Wikipedia (https://en.wikipedia.org/wiki/Teleprinter) )
I also used a CPC664 connected to small circuit (max232) to decode RTTY with some basic code.