We have also presented our concerns about some of the terminology currently used in the field. It seems that since many practitioners are inspired by biological processes, some language used in biochemistry has been adopted uncritically. For example, the focus in biology on the chemically incorrect, in our view, concept of ATP acting as a fuel, and the related and definitely incorrect concept of reactions being driven by "high energy" bonds. This section is intentionally provocative as we hope to encourage proper discussion around contentious terms. We propose the use of chemically "driven" instead of "fueled" for coupled systems that meet the requirements for a non-equilibrium steady state, as this term is more precise and does not have other connotations and associations. Similarly, we suggest that the words "fuel" and "waste" be replaced by "substrate" and "product", respectively.