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  2. WinRAR - Wikipedia

    en.wikipedia.org/wiki/WinRAR

    WinRAR is a trialware file archiver utility, developed by Eugene Roshal of win.rar GmbH. It can create and view archives in RAR or ZIP file formats, [6] and unpack numerous archive file formats. To enable the user to test the integrity of archives, WinRAR embeds CRC32 or BLAKE2 checksums for each file in each archive.

  3. List of archive formats - Wikipedia

    en.wikipedia.org/wiki/List_of_archive_formats

    Unix-like. RPM files consist of metadata concatenated with (usually) a cpio archive. Newer RPM systems also support other archives, as cpio is becoming obsolete. cpio is also used with initramfs. .shar. application/x-shar. Shell archive. Unix-like. A self-extracting archive that uses the Bourne shell (sh). .LBR.

  4. RAR (file format) - Wikipedia

    en.wikipedia.org/wiki/RAR_(file_format)

    WinRAR 2.06 is the last version to support Windows 3.1, Windows NT 3.1, Windows NT 3.5, Windows NT 3.51 and Win32s. RAR v3.93 is the last version that supports MS-DOS and OS/2 on 32-bit x86 CPUs such as 80386 and later. It supports long file names in a Windows DOS box (except Windows NT), and uses the RSX DPMI extender. [10]

  5. Data compression ratio - Wikipedia

    en.wikipedia.org/wiki/Data_compression_ratio

    Definition. Data compression ratio is defined as the ratio between the uncompressed size and compressed size: [1][2][3][4][5] Thus, a representation that compresses a file's storage size from 10 MB to 2 MB has a compression ratio of 10/2 = 5, often notated as an explicit ratio, 5:1 (read "five" to "one"), or as an implicit ratio, 5/1.

  6. Lossless compression - Wikipedia

    en.wikipedia.org/wiki/Lossless_compression

    Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of information. Lossless compression is possible because most real-world data exhibits statistical redundancy. [1] By contrast, lossy compression permits reconstruction only of an approximation of ...

  7. Comparison of file archivers - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_file_archivers

    Programs like bzip2, gzip, tar, zip usually come with systems that contain Ark; writing in .rar format requires a commercial program.[ 47 ] ^ abc supports the formats as stream compression of other archive format and can create compressed format like tar.bz2 or iso.xz but cannot create an archive in these formats.

  8. Data compression - Wikipedia

    en.wikipedia.org/wiki/Data_compression

    For the term in computer programming, see Source code. In information theory, data compression, source coding, [1] or bit-rate reduction is the process of encoding information using fewer bits than the original representation. [2] Any particular compression is either lossy or lossless. Lossless compression reduces bits by identifying and ...

  9. Solid compression - Wikipedia

    en.wikipedia.org/wiki/Solid_compression

    A tar.gz is created by joining the files in tar and then compressing with gzip. In computing, solid compression is a method for data compression of multiple files, wherein all the uncompressed files are concatenated and treated as a single data block. Such an archive is called a solid archive. It is used natively in the 7z [1] and RAR [2 ...