本产品的某些组件部分基于 Greg Roelofs 的工作。由于 Microsoft 已经将 Greg Roelofs 软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
Copyright ? 1998-1999 Greg Roelofs.All rights reserved.
This software is provided "as is," without warranty of any kind, express or implied.In no event shall the author or contributors be held liable for any damages arising in any way from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
Redistributions of source code must retain the above copyright notice, disclaimer, and this list of conditions.
Redistributions in binary form must reproduce the above copyright notice, disclaimer, and this list of conditions in the documentation and/or other materials provided with the distribution.
All advertising materials mentioning features or use of this software must display the following acknowledgment:
This product includes software developed by Greg Roelofs and contributors for the book, PNG:The Definitive Guide, published by O'Reilly and Associates.
本软件的某些组件部分基于 Hewlett-Packard 公司的工作。由于 Microsoft 已经将 Hewlett-Packard 公司的软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
Copyright ? 1994 Hewlett-Packard Company
Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.Hewlett-Packard Company makes no representations about the suitability of this software for any purpose.It is provided "as is" without express or implied warranty.
本软件的某些组件部分基于南加州大学 (University of Southern California) 的工作。由于 Microsoft 已经将南加州大学 (University of Southern California) 的软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
Copyright ? 1996 by the University of Southern California.All rights reserved.
Permission to use, copy, modify, and distribute this software and its documentation in source and binary forms for any purpose and without fee is hereby granted, provided that both the above copyright notice and this permission notice appear in all copies – and that any documentation, advertising materials, and other materials related to such distribution and use acknowledge that the software was developed in part by the University of Southern California, Information Sciences Institute.The name of the University may not be used to endorse or promote products derived from this software without specific prior written permission.
THE UNIVERSITY OF SOUTHERN CALIFORNIA makes no representations about the suitability of this software for any purpose.THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
本软件的某些组件部分基于 Luigi Rizzo 的工作。由于 Microsoft 已经将 Luigi Rizzo 的软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
? 1997-98 Luigi Rizzo (luigi@iet.unipi.it)
Portions derived from code by Phil Karn (karn@ka9q.ampr.org), Robert Morelos-Zaragoza (robert@spectra.eng.hawaii.edu) and Hari Thirumoorthy (harit@spectra.eng.hawaii.edu), Aug 1995
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
本软件的某些组件部分基于麻省理工学院 (Massachusetts Institute of Technology) 的工作。由于 Microsoft 已经将麻省理工学院 (Massachusetts Institute of Technology) 的软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
Copyright ? 1989,1990 by the Massachusetts Institute of Technology.All Rights Reserved.
WITHIN THAT CONSTRAINT, permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of M.I.T. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. M.I.T. makes no representations about the suitability of this software for any purpose.It is provided "as is" without express or implied warranty.
Under U.S. law, this software may not be exported outside the US without license from the U.S. Commerce department.
本软件的某些组件部分基于密歇根大学 (University of Michigan) 的 Regents 的工作。由于 Microsoft 已经将密歇根大学 (University of Michigan) 的 Regents 软件纳入本产品，Microsoft 需要包含该软件所附的以下文本：
Copyright ? 1995,1996 Regents of The University of Michigan.All Rights Reserved.
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appears in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of The University of Michigan not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission.This software is supplied as is without expressed or implied warranties of any kind.
