Files with eis file extension can be mostly found as projects from EIS Spectrum Analyser for Microsoft Windows.
EIS file extension - EIS Spectrum Analyser project
What is eis file? How to open eis files?
File type specification:
The eis file extension is used by EIS Spectrum Analyser, a Windows program for analysis and simulation of impedance spectra.
The eis file contains project created in the EIS Spectrum Analyser.
This eis file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.