The RAR means Roshal Archive. It is a file format that supports data compression, error recovery, and file spanning.
The filename extension used is .rar for the data volume set.
Show you the steps on how to open the .rar file format:
1. First you need to right click the winrar file>click extract files
2. Choose where you want to put your extracted files, either in C:/ or E:/ or in any documents>Click OK
3. Then it shows up the extracted files.
For further information and answers, please do visit this site:
http://www.techyv.com/questions/how-open-rar-file
Hope this help. :)