In this very interesting article, I have to say that It took me hard to understand, to a large extent, what the author wants to present.
Author, at the beginning, criticizes the current materialism. As he says that the materialism now is narrow, and only concerning about the physical stuff and discursive. His key idea is that matter, here he mentions, he made up of ‘stuff’ and ‘things’. Stuff means physical stuff that is materialist as people recognized. About the ‘things’, as the author says, is something invisible, recognized by people’s brain. Yep, the relations between machines.