Honours
    1. Keynote Speaker, National Conference on Computer Vision, Pattern Recognition, Image Processing and Graphics (NCVPRIPG), Jaipur, 2010 (Topic: Sense Disambiguation).
    2. Organizing Chair, 5th International Conference on Global Wordnet, 2010.
    3. Recipient, Manthan Award for Hindi Wordnet, 2009.
    4. Recipient, P.K. Patwardhan Award for Technology Development, 2008.
    5. Workshop Co-chair, 48th Annual Meeting of Association of Computational Linguistics (ACL 2010), Upsala, Sweden to be held on July 11-16, 2010.
    6. Program Committee member,18th ACM Conference on Information and Knowledge Management (CIKM 2009), Hong Kong, China, November 2-6, 2009.
    7. Keynote Speaker, "NLP and Indian Language Wordnets", Asian Language Resources Summit (ALRS), December 9-11, 2008, Phuket, Thailand.
    8. Chairman, Committees for monitoring progress in Language Technology projects for (i) Languages in the North East, (ii) Punjabi and (iii) Kashmiri. Term of reference 24 months, May 2008- April 2010.
    9. IBM Innovation Award (project: "Indian Language Integration of the Untructured Information Mangaement Architecture"), 2007.
    10. Program Committee Member, Areas: "Lexicon, Lexical Semantics and Sense Disambiguation" and "Resources", COLING 2008.
    11. Area Chair, Language Resources, ACL 2008.
    12. Microsoft Distinguished Researcher Grant (area: "Linguistic Data Management"), 2007.
    13. Invited Seminar, Semantic Graphs, their Application in MT and IR, and Lexical Knowledge Networks , at Oxford University, University of Edinburgh and Glasgow University, June-July, 2007.
    14. Session chair, Named Entity Recognition, International Joint Conference on Artificial Intelliegnce (IJCAI 2007), Hyderabad, January, 2007.
    15. Panelist, Challenges in NLP: Some New Perspectives from the East, ACL-COLING 2006, Sydney, July, 2006.
    16. Program Chair, Symposium on Modelling and Shallow Parsing of Indian Languages, Mumbai, India, April, 2006.
    17. Visiting Research Fellow, 1990, Massachusetts Institute of Technology, Cambridge, USA.
    18. Visiting Professor, 2004, Stanford University, Palo Alto, USA.
    19. Professeur Invite', 2005, Groupe D'Etude en Traduction Automatique-Communication Langagiere et Interation Personne-Systeme (GETA-CLIPS) and Universite Joseph-Fourier, Grenoble, France.
    20. Invited to contribute an article on Artificial Intelligence in the section Information Technology for Sustainable Development in the Encyclopedia of UNESCO, 2005.
    21. Judge and Keynote Speaker, Asian Computing Competition and Exhibition, Lahore, Pakistan,, 12-13 March, 2005.
    22. Member, National Knowledge Commission: task force on translation, set up by the Prime Minister of India, 2005-6.
    23. Member, Committee on Language Technology, set up by the Planning Commission of India, 2006.
    24. Also see