Although the specification should be clear and straightforward with avoidance of unnecessary technical jargon, the use of recognized terms of art is acceptable, and will often be desirable. Terms already having an established meaning should not be allowed to be used to mean something different if this is likely to cause confusion. There may, however, be circumstances where a term may legitimately be borrowed from a(n) _____ art. Terminology and signs must be consistent throughout the application. Choose the one that best completes the above sentence.