Looks kinda like ASCI-Art used to represent a greyscale image data area, like it could be so they can put "notes data" and someone got the idea to just scan thi

Looks kinda like ASCI-Art used to represent a greyscale image data area, like it could be so they can put "notes data" and someone got the idea to just scan this "notes" and figured ascii-art was the easy way since it was black and white info anyway. Just a hunch though... If theres a specific reason I'd love to know too.