IBM Research has been actively pursuing research in Natural Language Processing over the last few decades. Our mission is to offer speech and language technologies that form the core of current and future products and solutions for processing natural language. We adopt linguistic, knowledge-based, statistical, as well as hybrid methods to natural language processing. Furthermore, our work addresses theoretical issues of computational linguistics and encompasses a wide range of application areas such as speech processing, machine translation, question answering, interactive dialogue systems, text mining and information extraction, natural language understanding and generation, information retrieval, and automatic text summarization.
Many links to IBM research, often quite academic.
Difficulty 8/10
http://domino.research.ibm.com/comm/research.nsf/pages/r.nlp.spotlight.html