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The first popular open source MUD. The firstversion of AberMUD, named after Aberystwyth, UK, was writtenin B by Alan Cox, Richard Acott, Jim Finnis, and LeonThrane, at University of Wales, Aberystwyth for an oldHoneywell mainframe and opened in 1987. The gameplay washeavily influenced by MUD1, written by Roy Trubshaw andRichard Bartle, which Alan Cox had played at the University ofEssex. In late 1988, Alan Cox ported AberMUD to C so itcould run under UNIX on Southampton University's Mathsmachines. This version was named AberMUD2. Various otherversions followed.