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This chapter has introduced new concepts in programming, natural language processing, and linguistics, all mixed in together. Many of them are consolidated in the following chapters. However, you may also want to consult the online materials provided with this chapter (at http://www.nltk.org/), including links to additional background materials, and links to online NLP systems. You may also like to read up on some linguistics and NLP-related concepts in Wikipedia (e.g., collocations, the Turing Test, the type-token distinction).
You should acquaint yourself with the Python documentation available at http://docs.python.org/, including the many tutorials and comprehensive reference materials linked there. A Beginner’s Guide to Python is available at http://wiki.python.org/moin/BeginnersGuide. Miscellaneous questions about Python might be answered in the FAQ at http://www.python.org/doc/faq/general/.