n.A group of similar records that are arranged according to a filing system and that are related as the result of being created, received, or used in the same activity; a file group; a record series.APPM2 1989, 1.0A [Series1] File units or documents arranged in accordance with a filing system or maintained as a unit because they relate to a particular subject or function, result from the same activity, have a particular form, or because of some other relationship arising out of their creation, receipt, or use. Also known as record series. In archival practice, the series is the usual unit of cataloging or description.ISAD(G) 2000, 11Series. Documents arranged in accordance with a filing system or maintained as a unit because they result from the same accumulation or filing process, or the same activity; have a particular form; or because of some other relationship arising out of their creation, receipt, or use.A group of items, each with its own title, also bearing a collective title for the group as a whole.