ncsa license

NCSA许可证是一种开源软件许可证，它是由美国国家计算科学应用研究所（NCSA）创建的。该许可证允许用户自由地使用、修改和分发软件，但要求在软件的副本中包含版权声明和许可证条款。此外，NCSA许可证还要求在使用软件的研究论文或出版物中引用原始软件的来源。

以下是NCSA许可证的一个示例：

Software License Agreement (NCSA)

Version 1.0

1. This Agreement ("Agreement") is made and entered into by and between the
   University of Illinois Board of Trustees ("Licensor") and the party
   ("Licensee") who has agreed to the terms of this Agreement.

2. Licensor hereby grants Licensee a non-exclusive, royalty-free, perpetual,
   worldwide license to use, copy, modify, and distribute this software and
   its documentation, without fee, provided that this license agreement
   and copyright notice appear in all copies of the software and its
   documentation, and that Licensee does not sell the software.

3. Licensee may distribute the software and its documentation in object code
   form only, provided that: (a) Licensee ensures that any distribution of
   the software and its documentation by Licensee includes a verbatim copy
   of this Agreement, and (b) Licensee ensures that any distribution of the
   software and its documentation by Licensee includes the original source
   code and source code comments, if any, for the software.

4. Licensee may make derivative works of the software and distribute such
   derivative works, provided that: (a) Licensee ensures that any
   distribution of derivative works of the software by Licensee includes a
   verbatim copy of this Agreement, and (b) Licensee ensures that any
   distribution of derivative works of the software by Licensee includes the
   original source code and source code comments, if any, for the software.

5. Licensee agrees that any public display, public performance, sale,
   lease, rental, distribution, or other transfer of the software and its
   documentation by Licensee shall be in compliance with all applicable
   laws, including but not limited to copyright laws.

6. Licensee agrees that Licensor has no duty of support or maintenance of
   any kind with respect to the software and its documentation.
7. THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
   EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
   ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
   LICENSEE. SHOULD THE SOFTWARE PROVE DEFECTIVE, LICENSEE ASSUMES THE COST
   OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

8. IN NO EVENT SHALL LICENSOR BE LIABLE TO LICENSEE OR ANY OTHER USERS OF
   THE SOFTWARE FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR
   LOSS OF PROFITS, OR FOR ANY CLAIMS OR DEMANDS AGAINST LICENSEE BY ANY
   OTHER PARTY, EVEN IF LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF
   SUCH DAMAGES. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR
   LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE
   EXCLUSION MAY NOT APPLY TO LICENSEE.

9. This Agreement shall be construed and governed by the laws of the State
   of Illinois, without regard to its conflicts of law provisions.

10. This Agreement constitutes the entire agreement between the parties
    with respect to the subject matter hereof and supersedes all prior
    oral or written agreements, understandings or representations between
    the parties relating to the subject matter hereof. Any modifications
    to this Agreement must be in writing and signed by both parties.