More advanced archivers store additional metadata, such as the original timestamps, file attributes or access control lists.
Reconstructing the original files from the archive is termed unarchiving, unpacking or extracting.
[1] The Unix tools ar, tar, and cpio act as archivers but not compressors.
The filename extensions are successively added at each step of this process.
This approach has two goals: This approach, however, has disadvantages too: The built-in archiver of Microsoft Windows as well as third-party archiving software, such as WinRAR and 7-zip, often use a graphical user interface.