Files with BI extension might also be found as addon signatures from modifications for Bohemia Interactive games (ArmA series).
There are 2 other file types using
the BI file extension!
.bi - Progress database before image
.bi - Microsoft Visual Basic for DOS include data
Detailed description
Software that open bi file
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BI file extension - Bohemia Interactive addon signature file
What is bi file? How to open bi files?
The BI file extension is also used for special signature files used in mods for games from Bohemia Interactive, such as ArmA. These files are used to prevent cheating in modifications for the game.
The default software associated to open bi file:

ArmA: Armed Assault 
Company or developer:
Bohemia Interactive
ArmA: Armed Assault is a tactical military first- and third-person shooter developed by Czech studio Bohemia Interactive and released in 2006.
Help how to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .bi file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
List of recommended software applications associated to the .bi 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 bi file, edit bi file, convert bi file, view bi file, play bi file etc. (if exist software for corresponding action in File-Extensions.org's database).
Settings file type for software that use bi file - Bohemia Interactive addon signature file
Programs supporting the exension bi on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about ArmA: Armed Assault for settings bi file action.
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