"Steve Guttenberg," unless there is a much more intellectual seventh _Police Academy_ sequel uncovering his secret time traveling invention, probably didn't contribute very much to the printing press.

"Johannes Gutenberg," in spite of not appearing in _Police Academy 7: Mission to Moscow_ or kissing Sharon Stone in _Police Academy 4: Citizens on Patrol_ (the true highlight of the series, as many aficionados will readily attest), probably deserves our thanks instead.

You got me! Edited. Thank you.

I think just the human ability to record thoughts for future generations and a strong communication system.

Without the ability to effectively communicate we wouldn't have achieved anything else.

Then we should go all the way back to papyrus and stone chisels. Information storage, while not unique to humans, is definitely more prolific in our species.

What other species stores information?

I put animals that mark their territory in this category. Bears scratch the bark off trees. Dogs pee on fire hydrants. These animals are storing ownership information in the form of scents they leave behind.