Document' is the usual archival term for a single item. Records are all documentary material, regardless of physical form or characteristics, made or received and maintained by an institution or organization in pursuance of its legal obligations or in the transaction of its business.
Records are unique.
They result from the activities of the institution. All records are documents, but not all documents are records. Archives are the records of an institution or organization that are determined to have permanent value either as evidence of the operation of that institution or because they provide important information about people, places, events, or phenomena. All archives are records, but not all records are archives. Personal papers are groups of documents having some coherence or common identity, but generally without the nature of a complete record characteristic of an archival or records collection.