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								NETHACK GENERAL PUBLIC LICENSE (Copyright 1989 M. Stephenson)


								(Based on the BISON general public license, copyright 1988 Richard M. Stallman)


								Everyone is permitted to copy and distribute verbatim copies of this license,

								but changing it is not allowed. You can also use this wording to make the

								terms for other programs.


								The license agreements of most software companies keep you at the mercy of

								those companies. By contrast, our general public license is intended to give

								everyone the right to share NetHack. To make sure that you get the rights

								we want you to have, we need to make restrictions that forbid anyone to deny

								you these rights or to ask you to surrender the rights. Hence this license

								agreement.


								Specifically, we want to make sure that you have the right to give away copies

								of NetHack, that you receive source code or else can get it if you want it,

								that you can change NetHack or use pieces of it in new free programs, and

								that you know you can do these things.


								To make sure that everyone has such rights, we have to forbid you to deprive

								anyone else of these rights. For example, if you distribute copies of NetHack,

								you must give the recipients all the rights that you have. You must make sure

								that they, too, receive or can get the source code. And you must tell them

								their rights.


								Also, for our own protection, we must make certain that everyone finds out

								that there is no warranty for NetHack. If NetHack is modified by someone else

								and passed on, we want its recipients to know that what they have is not what

								we distributed.


								Therefore we (Mike Stephenson and other holders of NetHack copyrights) make

								the following terms which say what you must do to be allowed to distribute

								or change NetHack.


								COPYING POLICIES


								1. You may copy and distribute verbatim copies of NetHack source code as you

								receive it, in any medium, provided that you keep intact the notices on all

								files that refer to copyrights, to this License Agreement, and to the absence

								of any warranty; and give any other recipients of the NetHack program a copy

								of this License Agreement along with the program.


								2. You may modify your copy or copies of NetHack or any portion of it, and

								copy and distribute such modifications under the terms of Paragraph 1 above

								(including distributing this License Agreement), provided that you also do

								the following:


								a) cause the modified files to carry prominent notices stating that you changed

								the files and the date of any change; and


								b) cause the whole of any work that you distribute or publish, that in whole

								or in part contains or is a derivative of NetHack or any part thereof, to

								be licensed at no charge to all third parties on terms identical to those

								contained in this License Agreement (except that you may choose to grant more

								extensive warranty protection to some or all third parties, at your option)


								c) You may charge a distribution fee for the physical act of transferring

								a copy, and you may at your option offer warranty protection in exchange for

								a fee.


								3. You may copy and distribute NetHack (or a portion or derivative of it,

								under Paragraph 2) in object code or executable form under the terms of Paragraphs

								1 and 2 above provided that you also do one of the following:


								a) accompany it with the complete machine-readable source code, which must

								be distributed under the terms of Paragraphs 1 and 2 above; or,


								b) accompany it with full information as to how to obtain the complete machine-readable

								source code from an appropriate archive site. (This alternative is allowed

								only for noncommercial distribution.)


								For these purposes, complete source code means either the full source distribution

								as originally released over Usenet or updated copies of the files in this

								distribution used to create the object code or executable.


								4. You may not copy, sublicense, distribute or transfer NetHack except as

								expressly provided under this License Agreement. Any attempt otherwise to

								copy, sublicense, distribute or transfer NetHack is void and your rights to

								use the program under this License agreement shall be automatically terminated.

								However, parties who have received computer software programs from you with

								this License Agreement will not have their licenses terminated so long as

								such parties remain in full compliance.


								Stated plainly: You are permitted to modify NetHack, or otherwise use parts

								of NetHack, provided that you comply with the conditions specified above;

								in particular, your modified NetHack or program containing parts of NetHack

								must remain freely available as provided in this License Agreement. In other

								words, go ahead and share NetHack, but don't try to stop anyone else from

								sharing it farther.