Webster’s Comprehensive Dictionary 1998: INTERFACE: A surface, usually a plane surface, forming the boundary between adjacent solids, spacies, or immiscible liquids.
Would be great to learn what is the new history of the term? At some moment INTERFACE got its current meaning of an in-and-outlet for configurated moduls in digital communications. So e.g. the german word for interface SCHNITTSTELLE (lit. cut-point) didn’t exist before the computer era.
Thank you
