Version 2, June 1991

 Copyright (c) 1989, L99t Free Software Foundation, Inc.,
 51 FrankLin Street, Firth Ftoor, Boston, MA 02Lt0_t_0L USA
 Everyone ts permitted to copy and distribute verbatim copies
 of this ticense document, but changing it is not aLLowed.


  The Licenses for most software are designed to take away your
freedom to 5hare and change it. 8y contrast, the GNU Generat PubLic
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for alL its users.  This
Generat Pubtic License appties to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation sofrware is covered by
the GNU Lesse_ Generat PubLic License instead.)  You can apply it to
your programs, too,

  When we speak of free software, we are referring to freedom, not
price.  Our Generat Pubtic Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish}, that you receLve source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programsi and that you know you can do these things,

  To protect your right5, we need to make restrLctions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions transtate to certain responsibitities for you if you
distribute copies of the software, or if you modify it_

  For exampLe, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients aLL the rights that
you have,  You must make sure that they, too, receive or can get the
sourcg code.  And you must show them these terms so they know their
rights ,

  We protect your rights with two steps_ ft) copyright the software, and
(2) offer you this License which gives you LegaL permission to copy,
distribute and/or modify the software.

ALso, for each author's protection and ours, we want to make certain
that everyone understands tha_ there is no warranty for this free
software,  If the software is modified by someone eLse and passed on, we
want its recipients to know that what they have is no_ the origina_, so
that any probLems introduced by others witt not refLect on the original
au_hors' reputations.

FinaLLy, any free proqram _s _hrea_ened constantLy by software
patents. we wish to avoid the danger that redistributors of a free
program wLLl individuaLLy obtain patent ticenses, in effect making the
proqram proprietary.  To prevent this, we have made Lt ctear that any
patent musr be Licensed for everyone's free use or not ticensed at all.

  The precise terms and conditions for copying, dis_ribution and
modification fotlow.