ACCn

Accn is a shorthand term used in several technical domains to denote a distinctive identifier associated with a record, item, or account. Its exact meaning depends on the context, but it most commonly stands for accession number or account number in practice.

In data management and information systems, accn often appears as a field name or variable representing an account number or a unique reference code. It can be numeric, alphanumeric, or a combination, and formats vary by software system, database, or organizational convention. As a field label, accn helps link records across tables, transactions, or user accounts.

In biology and bioinformatics, accn is widely used as an abbreviation for accession number. An accession number uniquely identifies a sequence, record, or entry in public databases such as GenBank, EMBL, or DDBJ. Accession numbers are persistent identifiers that may change with database updates, and they sometimes acquire a version suffix (for example, a version like .2) to reflect revisions or re-annotations of the record.

In library and archival science, the term accession number refers to the unique identifier assigned to an item at the time it is added to a collection. This number is used in catalog records, inventory management, and provenance documentation to track physical objects over time.

Overall, accn is an informally used shorthand that spans accounting, genomics, and library work. Its precise format and governance are determined by the relevant domain and data standards in use. See also accession number and account number for related concepts.