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ARC is a lossless data compression and archival format by System Enhancement Associates (SEA). The file format and the program were both called ARC. The format is known as the subject of controversy in the 1980s, part of important debates over what would later be known as open formats.
.arc, .ark application/ octet-stream: ARC: Multiple Multiple Yes Very popular in the early days of BBSes, one of the first to offer compression and archiving in a single program. Largely replaced by PKZIP. .arc, .cdx application/ x-freearc: FreeArc: Windows, Linux: Windows, Linux: Yes Open source file format developed by Bulat Ziganshin.
FreeArc uses LZMA, prediction by partial matching, TrueAudio, Tornado and GRzip [7] algorithms with automatic switching by file type. Additionally, it uses filters to further improve compression, including REP (finds repetitions at separations up to 1gb), DICT (dictionary replacements for text), DELTA (improves compression of tables in binary data), BCJ (executables preproccesor) and LZP ...
7-Zip comes with a file manager along with the standard archiver tools. The file manager has a toolbar with options to create an archive, extract an archive, test an archive to detect errors, copy, move, and delete files, and open a file properties menu exclusive to 7-Zip.
Prior to release 5.3, PeaZip installers for Windows and Win64 (but nor Portable or Linux) were bundled with an OpenCandy advertising module which during installation offered optional installation of third-party software; the official download page provided alternative installers without this module, named 'plain'. Later releases do not have an ...
Heritrix includes a command-line tool called arcreader which can be used to extract the contents of an Arc file. The following command lists all the URLs and metadata stored in the given Arc file (in CDX format): arcreader IA-2006062.arc The following command extracts hello.html from the above example assuming the record starts at offset 140:
The operating systems the archivers can run on without emulation or compatibility layer. Ubuntu's own GUI Archive manager, for example, can open and create many archive formats (including Rar archives) even to the extent of splitting into parts and encryption and ability to be read by the native program.
ArcExplorer is a lightweight data viewer from ESRI for maps and GIS data in these formats: . ESRI Shapefile; ArcInfo coverages; ArcSDE layers; Images; ArcIMS Services (e.g., Geography Network sources)