Natural Language Toolkit (NLTK)   nltk.org            

Authors: Steven Bird <sb@csse.unimelb.edu.au>
         Edward Loper <edloper@gradient.cis.upenn.edu>
         Ewan Klein <ewan@inf.ed.ac.uk>

Copyright (C) 2001-2008 University of Pennsylvania

For license information, see LICENSE.txt

NLTK -- the Natural Language Toolkit -- is a suite of open source
Python modules, data sets and tutorials supporting research and
development in Natural Language Processing.

Documentation: A substantial amount of documentation about how
to use NLTK, including a textbook and API documention, is
available from the NLTK website: http://nltk.org/

  - The book covers a wide range of introductory topics in NLP, and
    shows how to do all the processing tasks using the toolkit.
    http://nltk.org/index.php/Book

  - The toolkit's reference documentation describes every module,
    interface, class, method, function, and variable in the toolkit.
    This documentation should be useful to both users and developers.  
    http://nltk.org/doc/api/

Mailing Lists: There are several mailing lists associated with NLTK:

  - nltk-announce: Public information and announcements
      about NLTK (very low volume)
      http://lists.sourceforge.net/lists/listinfo/nltk-announce
  - nltk-users: Discussions between NLTK users
      http://lists.sourceforge.net/lists/listinfo/nltk-users
  - nltk-devel: Discussions between NLTK developers
      http://lists.sourceforge.net/lists/listinfo/nltk-devel
  - nltk-commits: Subversion commit logs for NLTK
      http://lists.sourceforge.net/lists/listinfo/nltk-commits
  - nltk-teach: Discussions between people teaching courses using NLTK
      (closed list) please contact Steven Bird <sb@csse.unimelb.edu.au>
  - language-specific mailing lists exist for discussions concerning
      translation of the book

Contributing: If you would like to contribute to NLTK,
    please see http://nltk.org/index.php/Contribute

Donating: Have you found the toolkit helpful?  Please support NLTK development
    by donating to the project: http://sourceforge.net/donate/index.php?group_id=30982

Redistributing: NLTK source code is distributed under the Gnu Public License.
    NLTK documentation is distributed under the
    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States
    license.  NLTK corpora are provided under the terms given in the README file
    for each corpus; all are redistributable, and available for non-commercial use.
    NLTK may be freely redistributed, subject to the provisions of these licenses.

Citing: Please cite NLTK as follows:
    Bird, Steven, Edward Loper and Ewan Klein (2008).
    Natural Language Toolkit.  http://nltk.org/
