I have seen the strips of paper for tracking flight plans... I don't remember if they still use those. I won't swear that they don't.

As a kid, I used to kill time in the LaGuardia TRACON ferrying around the paper strips to the controllers (and stacking up the plastic slides in pyramids & whatnot); I'm not sure the last time I went in, but I'm fairly sure it was between 1998 and 2001 (9/11 closed the TRACON to visits by controllers' kids).