n.a group of related documents treated as a single item for purposes of classification, storage, and retrievalHolmes 1964, 24Arrangement at the filing unit level—the breakdown of the series into its filing unit components and the physical placement of each component in relation to other components in some logical sequence, a sequence usually already established by the agency so that the archivist merely verifies and accepts it.Dryden 1990, 107Additional working groups have been established to develop rules for description of particular media at the series, filing unit (where appropriate), and item level.Carmicheal 2019, 18Filing unit. This is an organized group of records; the simplest example is a file folder of records that relate to the same subject, activity, or transaction. Each filing unit with the personnel records, for example, may contain documents related to one employee.
A filing unit is not necessarily the same as a physical item. While a single folder containing all related documents is the most common example of a filing unit, a large file spanning several folders is also considered a single filing unit.