Microform is the generic term for any type of micro record.
Microfiche are small flat sheets of photographic film.
This format is used for a wide variety of materials. Back issues of magazines and certain government publications are only two of the resources that Carrier Library has on microfiche. Microfilm is a roll of photographic film. The library orders many of its newspaper back issues in microfilm. If you re a fan of old espionage movies, this is the technology the movie spies used.