: It can refer to a Tile Map Service (TMS) key structure used to organize map tiles in storage systems like GeoServer .
: In POS (Point of Sale) systems, a TMS key is a remote download index used for managing transaction security on devices like those found on FCC Report . September_Ultros_Key_tms.key
: This likely acts as a timestamp or version identifier (e.g., a key rotated or generated in September). Recommendation If you found this file on your system or in a repository: : It can refer to a Tile Map