Files with ex3 extension are used for the Harvard Graphics ChartXL software. They contain device drivers.
Software that open ex3 file
EX3 file extension - Harvard Graphics device driver file
What is ex3 file? How to open ex3 files?
File type specification:
The ex3 file extension is associated with presentation application developed by Harvard Graphics. The .ex3 file stores device driver. The Harvard Graphics company was acquired by the Serif Ltd. in 2001.
List of recommended software applications associated to the .ex3 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 ex3 file, edit ex3 file, convert ex3 file, view ex3 file, play ex3 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with ex3 file - Harvard Graphics device driver file
Click on the software link for more information about Harvard Graphics ChartXL. Harvard Graphics ChartXL uses ex3 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.).