“In the theory of computation, for instance, one is often interested to know whether a given set of gates, when combined in parallel and sequentially, can be used to build a circuit that allows the solution of computational problems in a given complexity class. One can therefore think of gate sets as resources for achieving computational tasks.

As another example, in the theory of communication, one is interested to know whether certain kinds of noisy channels can be combined, together with pre- and post-processing, to simulate a noiseless channel, so that channels can be considered as resources for communication tasks. “

_A mathematical theory of resources_