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  2. DiskDoubler - Wikipedia

    en.wikipedia.org/wiki/DiskDoubler

    The file in question is quickly compressed and replaced by a similar icon stamped with a small "DD" tag to indicate it was compressed. The original Classic Mac OS did not include any sort of composite icon support, so DiskDoubler had to copy and modify every icon it found and then hand those modified icons back to the Finder with a new file ...

  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. 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 such as tar for tasks such as handling multiple files, and other tools for encryption, and archive splitting.

  5. zlib - Wikipedia

    en.wikipedia.org/wiki/Zlib

    zlib (/ ˈ z iː l ɪ b / or "zeta-lib", / ˈ z iː t ə ˌ l ɪ b /) [2] [3] is a software library used for data compression as well as a data format. [4] zlib was written by Jean-loup Gailly and Mark Adler and is an abstraction of the DEFLATE compression algorithm used in their gzip file compression program. zlib is also a crucial component of many software platforms, including Linux, macOS ...

  6. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    EGT – EGT Universal Document, used in EGT SmartSense to compress PNG files to yet a smaller file; EXIF – Exchangeable image file format (Exif) is a specification for the image format used by digital cameras; GIF – CompuServe's Graphics Interchange Format; GRF – Zebra Technologies proprietary format; ICNS – format for icons in macOS.

  7. Executable compression - Wikipedia

    en.wikipedia.org/wiki/Executable_compression

    Executable compression can be used to prevent direct disassembly, mask string literals and modify signatures. Although this does not eliminate the chance of reverse engineering, it can make the process more costly. A compressed executable requires less storage space in the file system, thus less time to transfer data from the file system into ...

  8. 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.

  9. StuffIt - Wikipedia

    en.wikipedia.org/wiki/StuffIt

    Although Mac files generally did not use filename extensions, one of StuffIt's primary uses was to allow Mac files to be stored on non-Mac systems where extensions were required. So, StuffIt-compressed files save the resource forks of the Macintosh files inside them, and typically have the extension .sit.