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• Describes motion picture film that is 16 millimeters wide. In silent films it is perforated on both sides; in sound films only on one side, the other being used for the sound track. It was introduced in 1923 for the amateur market, and evolved into the common medium for home movie makers and filmmakers whose work was not intended for general theatrical release. Film of this size is typically used for independent films, documentaries, and films made for educational purposes.

Use for: dissertations

• Written treatises presenting the author’s scholarly investigation or original research on a specialized subject. Examples are treatises submitted for an advanced academic degree or historical European treatises written by the praeses or primary professor and defended by the respondent or degree candidate.

• Books in which financial accounts are kept.

• Books listing names with residences, usually in alphabetical order.

• Records that relate to budget, personnel, supply, and similar facilitative operations within an organization.

• Official or formal records outlining administrative details, or events sucha as functions, proceedings, or investigations.

• Public notices or paid announcements, especially those in print. For announcements paid for by an advertiser and broadcast on radio or television, use "commercials."

• Photographs of the earth taken from aircraft. For photographs taken from beyond the earth's atmosphere, use "space photographs." For photographs of celestial bodies or astronomical phenomena, use "astrophotographs."

• Writing made to evidence the terms and conditions, or the fact, of an accord or arrangement.

• Photographic prints having albumen as the binder; always black-and-white, though they may be toned to a monochrome hue.

• Books with blank pages used for assembling and presenting a collection, or any unpublished sets of pages that are bound or loose-leaf and have other materials affixed to them or writing or other images made on them. The volume may have been constructed with blank pages that were intended to have materials affixed, or it may have been assembled after having had materials affixed to separate pages.

• Publications, usually annuals, containing a variety of useful facts of miscellaneous nature, or statistical information; originally included projections of coming days, months, and holidays.

Use for: Ambrotypes

• Photographs produced by mounting a negative (made by a variant of the wet collodion process) that is on glass with a dark backing, which makes the image appear as a positive. Came into wide use in the United States in the early 1850s.

• Biospecimens that are taken from humans or animals, that are used for research or storage.

• Bibliographies with notes added to the entries to elucidate, evaluate, or describe the subject and contents of the entries.

• Documentation summarizing the activities of an organization over the course of a year.

• Books for recording engagements; usually containing calendars.