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2. ZIP (file format) - Wikipedia

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

   ZIP is an archive file format that supports lossless data compression.A ZIP file may contain one or more files or directories that may have been compressed. The ZIP file format permits a number of compression algorithms, though DEFLATE is the most common.

3. List of archive formats - Wikipedia

   en.wikipedia.org/wiki/List_of_archive_formats

   This means that compressed archives with the UC2 file extension can hold almost 1 million files. .uca PerfectCompress [17] Windows: Windows: No Based on PAQ, RZM, CSC, CCM, and 7zip. The format consists of a PAQ, RZM, CSC, or CCM compressed file and a manifest with compression settings stored in a 7z archive. .uha UHarc DOS/Windows: DOS/Windows ...

4. Express Zip - Wikipedia

   en.wikipedia.org/wiki/Express_Zip

   Express Zip File Compression Software is a file compression and archiving software program developed by NCH Software for Windows and Mac OS first released in 2010. [1] It offers the ability to open, manage, archive, extract, and compress digital documents into .zip, .tar, .tgz, .wim, .arj, and .lzh as well as additional archive formats. [2]

5. 7-Zip - Wikipedia

   en.wikipedia.org/wiki/7-Zip

   7-Zip is a free and open-source file archiver, a utility used to place groups of files within compressed containers known as "archives". It is developed by Igor Pavlov and was first released in 1999. [2] 7-Zip has its own archive format called 7z introduced in 2001, [12] but can read and write several others.

6. PKZIP - Wikipedia

   en.wikipedia.org/wiki/PKZIP

   Led by some BBS sysops who refused to accept or offer files compressed as .ARC files, users began recompressing any old archives that were currently stored in .ARC format into .ZIP files. The first version was released in 1989, as a DOS command-line tool, distributed under shareware model with a US$25 registration fee (US$47 with manual).

7. Data compression - Wikipedia

   en.wikipedia.org/wiki/Data_compression

   When audio files are to be processed, either by further compression or for editing, it is desirable to work from an unchanged original (uncompressed or losslessly compressed). Processing of a lossily compressed file for some purpose usually produces a final result inferior to the creation of the same compressed file from an uncompressed original.