"Archival repositories tend to fall into three categories. No matter what type of archives you have, a collection policy allows you to make sound acquisition decisions.
Institutional archives acquire and maintain the records of the parent organization or inter-related organizations. Collecting archives gather materials about a defined area, be it geographic, such as a state historical society, or topical, such as the Schlesinger Library at Harvard, which collects material on women’s history. Finally, combination archives collect both institutional records and outside materials, such as a university archives—which collects official institutional records and faculty papers and materials, as well as documents a subject specialty. [...]"
(dostęp z 3.05.2021)