- Audiovisual documents:
Audiovisual documents include sound recordings and/or moving images, and/or still images.
Long overlooked and infrequently used in academic and public reading libraries, the audiovisual document is today considered as a study aid and a useful resource for university courses.
This type of document has benefited from the development of new storage (digitization) techniques and new means of diffusion (Internet), and consequently is easier to access for the researcher.
- Multimedia documents:
According to Afnor, multimedia is a "group of technologies designed to manage data, sound and images in the same medium".
In either analogue or digital format, sound, images and multimedia are found on very varied devices: magnetic tapes, magnetic discs, photochemical media, and optical media.