"Preserving ancient alphabet art
I’d like to preserve the teletype artwork of the 60s and 70s. This early computer graphics output used the visual density of printed characters to approximate grey-scale imagery, sometimes with raw letterforms, sometimes with overstrike techniques. I’ve collected a few in electronic form, but I’d like some originals, too. Unfortunately, traditional fan-fold computer paper, and old roll-style teletype paper are not exactly acid-free or archival, and after these posters faded into yellowness, they were discarded."

Jefferson Computer Museum - Ancient Alphabetic Art