7-Zip is a file archiver with a high compression ratio. The main features
 of 7-Zip are:
  * High compression ratio in 7z format with LZMA and LZMA2 compression
  * Supported formats:
      * Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
      * Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT,
          GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2,
          RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.
  * For ZIP and GZIP formats, 7-Zip provides a compression ratio that is
      2-10 % better than the ratio provided by PKZip and WinZip
  * Strong AES-256 encryption in 7z and ZIP formats
  * Powerful command line version
 .
 "7zip" provides:
  * /usr/bin/7z: Full featured with plugin functionality.
  * /usr/bin/7za: Major formats/features only.
  * /usr/bin/7zr: LZMA (.7z, .lzma, .xz) only. Minimal executable.
 .
 Note: The unRAR code was dropped to keep compatible with DFSG.
       Install 7zip-rar package in non-free section to use RAR files.