Once extracted, you will likely find a folder containing the text documents, images, or software you are looking for.
This is a compressed format created by WinRAR. To open it, you need all the parts of the set in the same folder. How to see the "text" or content inside: R8.part1.rar
Ensure you have R8.part1.rar , R8.part2.rar , and any subsequent parts. Once extracted, you will likely find a folder