I have been using 7zip for about 2 years and after testing this free software it was a bless that this software is really remarkable. The compression ratio was amazing. I almost can compress my file to 70% smaller by using 7zip compression method.
7zip use 3 compression method and the method is LMZA, PPMd and Bzip2. This compression tools also support extraction of large format like zip, rar, tar, cab, iso, arj, chm, msi, rpm and others format. You also can pack file to various format like 7z, ZIP, GZIP, BZIP2 and TAR.
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