The archive often houses a DJVU file, a high-compression format used for scanned documents.

The filename also appears frequently on academic portals as a container for textbook solutions and exercise manuals.

It uses a proprietary algorithm that often provides better compression than standard .zip files.

It is commonly associated with compressed packages for: Introduction to Information Retrieval . Power Electronics (specifically manuals by Daniel W. Hart).

In European administrative and police research, "RAR" can refer to specialized reports.