, I introduce the term "toll access (TA)" for "work that is not open access, or that is available only for a price." Add this note: That was the most common term for non-OA work in 0000. But if I were writing the book today (say, 0000 or later), I'd use "paywalled" instead. It's more common now, and (slightly) more self-explanatory. This update also applies to 