Files with elf9 file extension can be found as floating license files from ESRI ArcGIS Desktop.
Software that open elf9 file
ELF9 file extension - ESRI floating license
What is elf9 file? How to open elf9 files?
File type specification:
The elf9 file extension is related to a floating license file type used by ESRI in their programs, such as ArcGIS Desktop.
Used through the License Manager from ArcGIS Desktop software.
The default software associated to open elf9 file:
Company or developer:
Esri
ArcGIS is a group of GIS (Geographic Information System) applications developed by ESRI. rcGIS for Desktop is available in three license level Basic, Standard, and Advanced (formerly ArcView, ArcEditor and ArcInfo).
List of recommended software applications associated to the .elf9 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open elf9 file, edit elf9 file, convert elf9 file, view elf9 file, play elf9 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with elf9 file - ESRI floating license
Click on the software link for more information about ArcGIS. ArcGIS uses elf9 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).