: Often a prefix for a specific collection (e.g., "Marine," "Mars," or an archival acronym like Yukon Archives' use of accession numbers).

: In institutional archives, these numbers often correspond to a specific box, folder, and item number within a catalog. Standard Guide for Handling Such Files

: It could be formatted as YYYYMMDDHHMMSS (Year, Month, Day, Hour, Minute, Second). For instance, "20106..." might refer to a date in June 2010.