A group of any records under the control of any agency from which information is retrieved by the name of the individual or by some identifying number, symbol, or other identifying particular…

The definition provided directly matches the definition of a 'system of records' as stipulated in the Privacy Act of 1974 (5 U.S.C. 552a(a)(5)), where records are organized and retrieved by an individual's name or other identifying particular.

A System Interconnection refers to the direct connection of two or more IT systems for the purpose of sharing data, which is unrelated to the definition of organized records retrieved by personal identifiers.

A System of Records Notice (SORN) is a public notification published in the Federal Register about an agency's system of records, not the system of records itself.

A System Inventory Process is a procedure for cataloging an organization's systems and assets, not a specific grouping of personally identifiable records.