[fao_]

And written language isn't a form of communication? (In your example, from yourself to a future form of yourself, or from yourself to the computer).

[catnaroek]

Well, if you take the view that persisting any representation of information from one spacetime event [0] to another is “communication”, then pretty much any physical process is “communication”. But then the term kinda starts to lose its meaning.

[0] https://en.wikipedia.org/wiki/Event_(relativity)