Copyright (c) 1994 Hewlett-Packard Company

   Copyright (c) 1996,97 Silicon Graphics Computer Systems, Inc.

   Copyright (c) 1997 Moscow Center for SPARC Technology.

   Copyright (c) 1997 Mark of the Unicorn, Inc.

   Copyright (c) 1999-2003 Boris Fomitchev

   Copyright (c) 2000 Jens Maurer

   Copyright (c) 2003-2008 Francois Dumont

   Copyright (c) 1997-2010 Petr Ovtchenkov

   Copyright (c) 2008-2009 Dmitry Osmakov

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