In the last two posts I’ve explored some ideas about what a *computer* is. More properly, what a *computation* is, since a computer is just something that does a computation. I’ve differentiated *computation* from *calculation* and, more importantly, *evaluation*. (This post assumes you’ve read **Part I** and **Part II**.)

I’ve also looked at *pancomputationalism* (the idea everything computes). The *post hoc* approach of mapping of random physical states to a computation seems especially empty. The idea of treating the physical dynamics of a system as a computation has more interesting and viable features.

That’s where I’ll pick things up.