a motion picture abandoned by its owner or caretaker. More generally, the term refers to all manner of films outside of the commercial mainstream: public domain mate rials, home movies, outtakes, unreleased films, industrial and educational movies, independent documentaries, ethnographic films, newsreels, censored material, un derground works, experimental pieces, silent-era productions, stock footage, found footage, medical films, kinescopes, smalland unusual-gauge films, amateur produc tions, surveillance footage, test reels, government films, advertisements, sponsored films, student works, and sundry other ephemeral pieces of celluloid (or paper or glass or tape or. . )I