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he themes or areas for discussion ? requirements for participation ? information about paper submission ? details of different sessions ? pre/postconference arrangements ? the acceptance or declination of the invitation for chairing a session ? the delayed abstract or paper submission ? the cancelation for the registration ? the disagreement to the paper presentation arrangement ? changing the time or mode of the oral presentation arrangement ? making some changes in the submitted paper ? application for financial assistance ? postconference joint researches ? bytheway visit to another concurrentlyheld conference Issues for Correspondence ? Clearness ? Conciseness ? Correctness ? Courtesy ? customariness Letters for Inquiry ? the formal name of the conference (or the information source) ? the specific inquires or requests ? the closing of the letter (A letter of inquiry for the deadline of submission ) Dear Professor Smith, I am the Deputy Director of the Zhongyuan Institute of Acoustics in Zhengzhou, China. Since we have been undertaking researches on underwater imaging and ultrasonic nondestructive testing for many years, we are very much interested in attending the Twelfth International Symposium on Acoustical Imaging, which is to be held in London, dated 511th July, this year. We should be very much obliged if you could kindly give us information on the deadline for the submission of abstracts, papers, and other written materials. I am looking forward to hearing from your soon. Sincerely yours, (signature) printed name A letter of inquiry for meeting information details Dear Mr. Jannotta, I have learned from Progress in Physics, , 1997 that the International Conference on Thermodynamics will be held in Sydney, Australia, from December 4 to 12, 1999. I would appreciate receiving the call for papers, circulars and other details of the conference. I thank you in anticipation of an early reply. Yours sincerely, (signature) printed name (A letter of inquiry for current status of the submitted paper) Dear Dr. Lichty, It is more than two months since I sent to you my paper, but I have not received any information yet. As far as I know one can be invited to the symposium only when his paper is accepted. In order to make necessary preparations for the meeting as early as possible, I would like to be informed of the present status of my submitted paper. Yours sincerely, (signature) printed name (A letter of inquiry for another conference ) Dear Dr. Helps, Many thanks for your letter of July 5. We have learned that following the Sixth International Conference on Pattern Recognition, there will be two additional conferences to be held in Germany: (1) IEEE Workshop on Applied Time Series Analysis (Technical University, Munich, October 23, 1996) and (2) ISMIII International Symp