The extension .rar stands for Roshal Archive , named after its creator, Eugene Roshal.

A RAR file is a compressed archive used to bundle multiple files into a single, smaller package for easier sharing or storage.

If you encountered this in a medical or billing context, "22414" might be a typo for several common codes:

This number may be a specific internal ID, a date (e.g., February 24, 2014), or a multi-part archive sequence number. 2. Medical Coding (CPT/ICD)