Merely by existing and evolving in time - by existing - any physical system registers information, and by evolving in time it transforms or processes that information.

One of the things that I've been doing recently in my scientific research is to ask this question: Is the universe actually capable of performing things like digital computations?

All physical systems can be thought of as registering and processing information, and how one wishes to define computation will determine your view of what computation consists of.

Seth Lloyd Quotes