winrar is a shareware compression and archiving of data created by Eugene Roshal. It is one of the few applications that can create and modify RAR archives (files with the extension. Rar), which are encoded with a proprietary compression algorithm.

 Features

    * Full support for RAR and ZIP archives can also decompress CAB, ARJ, LZH, TAR, GZ, UUE, BZ2, JAR, ISO, 7Z, Z and ACE.
    * Optional Storage encrypted with AES (Advanced Encryption Standard) with 128-bit key.
    * It can handle files and archives up to a maximum size of 8.589 billion gigabytes. The number of files in a single file is unlimited.
    * Can create self-extracting archives and / or divided into several parts (volumes).
    * Use data recovery capabilities that allow the reconstruction of damaged archives.
    * Supports advanced features of the NTFS file system and file names in Unicode.
    * From version 3.50 you can change the skin of the program.
    * From version 3.50 is compatible with Windows x64.
    * As of version 3.70 is compatible with Windows Vista.
    * From version 3.90 there are two versions: x86 and x64.
    * Can be used free for 40 days, after which a warning message appears each time the program that invites you to buy it.
    * After the recording of the program are provided for unlimited free updates.

 Locations

Albanian, Arabic, Bulgarian, Chinese Simplified, Finnish, French, German, Italian, Chinese Traditional, Danish, Dutch, English, Japanese, Korean, Macedonian, Portuguese, Brazilian, Romanian, Slovenian, Swedish, Ukrainian.

RAR (file format)

RAR is a proprietary file format for archiving and data compression, developed by Eugene Roshal. RAR is an acronym for Roshal ARchive fact.
The file extension is. Rar, the MIME type is application / x-rar-compressed.

 History

Roshal has originally developed the program and the RAR compression / decompression in DOS, later versions were created for other platforms. The compression algorithm is proprietary and unique software that support it are those issued by Rarsoft for Windows, Linux, MacOSX, freeBSD, and DOS, distributed as shareware. It was instead released the source code for the decompression algorithm for versions 1 and 2 of the RAR format, different software and support reading RAR files, including open-source software 7-Zip. No open-source software supports decompression of version 3 of the RAR format, however, supported by programs such as freeware, for example, WinImp.
Comparison with other compression algorithms
RAR Developer Eugene Roshal
Data Compression Type
Lossy / Lossless Lossless
License Shareware
Website http://www.rarlab.com/

The RAR is generally slower in operation than compression algorithms such as ZIP and gzip, but is able to obtain a better compression ratio in some situations. The algorithm of 7z LZMA provides a compression ratio similar to RAR, but the comparison depends on the type of data being compressed. NOTE: Often the Internet is available comparative tests that tend to demonstrate the compression format is better, whatever compression format you wish to use in assessing the reliability of these tests need to look: the type of data to be compressed, to 'indication of the version number of the programs used for testing (older versions of various compression programs give results generally lower than more recent versions, so you should take with caution the tests without this information was also present on the network are often Articles older than 5 years and as such is no longer current).
Features of RAR archives

In addition to the high compression ratio, the RAR format offers some original features:

    * You can manage files in volumes with efficiency and simplicity, possibly prompting the user for the location of the next volume. In addition, the extraction of a file does not need all the parts, but only those on which the file is actually present.
    * Create solid archives, the files are treated as a single block of data. This feature (also found in the other formats) improves the compression ratio, but in the case of file corruption, prevents the recovery of subsequent files.
    * You can encrypt the files with keywords, using the AES encryption algorithm.
    * You can enter the fields of recovery to prevent data corruption.
    * RAR supports the storage of NTFS streams and security information.