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2. Disk compression - Wikipedia

   en.wikipedia.org/wiki/Disk_compression

   A disk compression software utility increases the amount of information that can be stored on a hard disk drive of given size. Unlike a file compression utility, which compresses only specified files—and which requires the user to designate the files to be compressed—an on-the-fly disk compression utility works automatically through resident software without the user needing to be aware of ...

3. DriveSpace - Wikipedia

   en.wikipedia.org/wiki/DriveSpace

   Microsoft advertised DoubleSpace on the cover of MS-DOS 6 distributions (user's guide for MS-DOS 6 with Windows 3.1 pack-in pictured, DoubleSpace sticker top-right). In the most common usage scenario, the user would have one hard drive in the computer, with all the space allocated to one partition (usually as drive C:).

4. bzip2 - Wikipedia

   en.wikipedia.org/wiki/Bzip2

   bzip2 is a free and open-source file compression program that uses the Burrows–Wheeler algorithm.It only compresses single files and is not a file archiver.It relies on separate external utilities for tasks such as handling multiple files, encryption, and archive-splitting.

5. ALZip - Wikipedia

   en.wikipedia.org/wiki/ALZip

   Basically, it shows a much better compression rate than the Deflate algorithm used in the ZIP format, and even showed a compression rate comparable to or better than the LZMA algorithm of 7zip, which is known to have the strongest compression rate. You can experiment by changing the extension of the file to .com and compressing it in egg format.

6. 7-Zip - Wikipedia

   en.wikipedia.org/wiki/7-Zip

   The file manager, by default, displays hidden files because it does not follow Windows Explorer's policies. The tabs show name, modification time, original and compressed sizes, attributes, and comments (4DOS descript.ion format). When going up one directory on the root, all drives, removable or internal appear.

7. ZIP (file format) - Wikipedia

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

   Each file is stored separately, allowing different files in the same archive to be compressed using different methods. Because the files in a ZIP archive are compressed individually, it is possible to extract them, or add new ones, without applying compression or decompression to the entire archive. This contrasts with the format of compressed ...

8. 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 ...

9. lzip - Wikipedia

   en.wikipedia.org/wiki/Lzip

   For example, if the underlying file is a tar archive, this can allow extracting any undamaged files, even if other parts of the archive are damaged. As for the file format, special emphasis has been put on enabling integrity checks by means of an integrated 32-bit checksum for each compressed stream; [ 3 ] this is used in combination with the ...