: The official software for creating and opening these files.
: A popular, free, open-source alternative that handles many archive formats. 04 Knowledge.rar
: The .rar extension stands for Roshal Archive . It is a proprietary format used to bundle multiple files into a single, smaller package to save storage space and make sharing easier. : The official software for creating and opening these files
If you received "04 Knowledge.rar" from the internet or an unknown source, follow these precautions before opening it: Need to open, create, or convert a RAR file? - WinZip 04 Knowledge.rar
Because Windows and macOS do not always support .rar files natively, you will need a third-party "unarchiver" or "extractor":