lzma LZMA uses lossless data compression along with various algorithms. Been in development since 1996, it was originally used by the 7-zip software for computers like the 7z format. The algorithm uses a dictionary-like compression scheme that has similarities to the algorithm created by Jacob and Abraham Lempel in 1977, the LZ77 algorithm. The LZMA algorithm boasts an increased ratio of compression and a 4-gigabyte variable dictionary sized compression. The LZMA decompression speed is the same as other compression software algorithms.
rar The .rar filename extension is a popular and partially open archive file format associated with the compression and decompression tool WinRAR. The format was developed by Eugene Roshal with its initial release in 1993. It, like many other archive formats, acts as the compressed data container for one or several files. The archive format can maintain the directory structure of the compressed archive even when unpacked to a directory. The RAR file format supports multi volume file compression where an archive is saved as a sequence of several files of a given size.