An OIS file contains settings to customize the appearance of analyses windows in Origin. Origin is used by scientists and engineers for data analysis and graphing. You will likely never see an OIS file when using Origin.
OIS files store parameters referenced by Origin for analysis. They are usually located in the Origin install themes folder. Be cautious of .ois files from unknown sources.
The .ois extension can be associated with harmful software. The .ois extension is often incorrectly spelled as iis, ios, is, kis, lis, etc.
The .OIS file extension indicates the program to open the file. Different programs may however use this file type for different data types. We provide guidance on handling .ois files to make them easier to edit, convert or print as people often share them without instructions.
Known Software