I thought it was actually paper coding, as many of us learned to do before coding right away into a keyboard.
And paper debugging ! Fond memories of printing programs on continuous printer paper (paper with holes on the side, that many dot-matrix printers used) so that I could take my time to read them to figure out where the bugs where.
Whenever I proofread papers in college, I would always print them out. There's something about being able to physically hold the paper that makes keeping the whole idea in your head easier that just isn't possible on a screen, for me at least.