or microform versions but also
nonprint media and, in some circumstances, three-dimensional objects or realia. [Arts] 
n., A single record or item. Examples include: a sheet of paper with writing; an E-Mail message; a film with images; a magnetic
tape with a sound recording. [Arts] 
n., A single component or entity in a set of archival materials, usually a physically indivisible object. [Computer and Information
Sciences] 
n., Any specific type of file produced or edited by a specific application; usually c