Super Dimension Fortress

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Super Dimension Fortress (SDF, also known as freeshell.org) is one of the oldest public access UNIX systems on the Internet.

It has been operational in some shape since the year 1987 as a non-profit organization. The name derives from the Japanese anime series Super Dimension Fortress Macross, the original server having been used as a BBS for anime fans.

The system currently includes servers for regular use (DEC Alphas) as well as a TWENEX system. As well as offering free Unix shell access to its users, SDF provides both web and Gopher hosting - making it one of very few servers still running the latter protocol.

External links

• The website of SDF is at http://sdf.lonestar.org, http://sdf-eu.org/ and http://www.freeshell.org/
• The Gopher site is gopher://sdf.lonestar.org