7-Zip is a file archiver with a high compression ratio. The 7-Zip program is publicly available under the terms of the GNU Lesser General Public License. The 7z format initially appeared as implemented by the 7-Zip archiver. Both a folder and a 7Z file can store one or more files, and even other folders. It's a bit like a folder on your computer, except that it really acts like a file. A file with the 7Z file extension is a 7-Zip Compressed file. To extract them just place all the files in one folder along with the rar file that came with them and just extract the first file. rxx(00-99) files are multi part files that were created using WinRAR. Ready to be used in web design, mobile apps and presentations. When the conversion is complete, you can safely delete the original files.
When you convert 7-Zip into an ISO, you are really extracting the ISO from the zipped files.
It is a utility used to archive and encrypt files, sometimes into multiple parts.
