GNU Gzip is a popular data compression program originally written by Jean-loup Gailly for the GNU project. Mark Adler wrote the decompression part.
We developed this program as a replacement for compress because of the Unisys and IBM patents covering the LZW algorithm used by compress. These patents made it impossible for us to use compress, and we needed a replacement. The superior compression ratio of gzip is just a bonus.
Gzip can be found on the main GNU ftp server: http://ftp.gnu.org/gnu/gzip/ (via HTTP) and ftp://ftp.gnu.org/gnu/gzip/ (via FTP). It can also be found on the GNU mirrors; please use a mirror if possible.
Documentation for Gzip is available online, as is documentation for most GNU software. You may also find more information about Gzip by running info gzip or man gzip, or by looking at /usr/doc/gzip/, /usr/local/doc/gzip/, or similar directories on your system. A brief summary is available by running gzip --help.
Gzip has one mailing list: <email@example.com>. It is used to discuss all aspects of Gzip, including development and enhancement requests, as well as bug reports.
Announcements about Gzip and most other GNU software are made on <firstname.lastname@example.org>.
To subscribe to these or any GNU mailing lists, please send an empty mail with a Subject: header of just subscribe to the relevant -request list. For example, to subscribe yourself to the GNU announcement list, you would send mail to <email@example.com>. Or you can use the mailing list web interface.
Development of Gzip, and GNU in general, is a volunteer effort, and you can contribute. For information, please read How to help GNU. If you'd like to get involved, it's a good idea to join the discussion mailing list (see above).
Gzip is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
The Free Software Foundation is the principal organizational sponsor of the GNU Operating System. Support GNU and the FSF by buying manuals and gear, joining the FSF as an associate member, or making a donation, either directly to the FSF or via Flattr.