Copyright(c) 1993-1994 by Kresten Krab Thorup Copyright(c) 1994 by The Australian National University. Copyright(c) 1997 by Alfredo K. Kojima Copyright(c) 2000-2001 by Reed Lai Copyright(c) 2001 by Arthur Korn Copyright(c) 2001 by Timecop Copyright(c) 2001-2008 by wave++ "Yuri D'Elia"