unpacking of  ARJ ,  LZH ,  TAR ,  GZ ,  ACE ,  UUE ,  BZ2 ,  JAR ,  ISO ,  EXE ,  7z , and Z  archives. [6] Multithreaded compression The ability to create  self-extracting  and multi- volume  (split) archives. Data  redundancy  is provided via  recovery records  and  recovery volumes ,