Ha! Cunieform (the clay things) were simply marks chiseled into a medium. CD's (and before them, vinyl, wax, etc.) record their data by means of pits in the medium (LPs, etc. used "bump"). Granted, you need special equipment to recover the data, but the method is the same.

I believe that the scripts of Easter Island are incised into stone. See above -- and the nearest headstone or monument.

You're confusing the means and the message. Alphabets change -- it wasn't very long ago that the Roman alphabet didn't use "J" or "U", for instance. Alphabets even disappear. The means, in one form or another, stays around.

E.g.:

* scrolling down the computer screen
* a reel of film, microfilm -- and even a cassette -- is a scroll

New methods of recording information come along every so often -- RFID, for instance. But we continue to use the old methods, though they might be diguised in new clothes.