1. The Joint Statistical Meeting, Chicago, Agu.4-7, 1996, U.S.A. 

  2. Conference on Mathematics and 21st Century, 15-20 Jan., 2000, Cairo, Egypt.

  3. Fourth International Scientific Conference, Faculty of Science, Al-Azhar University, March 27-29, 2001, Cairo, Egypt

  4. 10 th International Symposium on Applied Stochastic Models and Data Analysis (ASMDA2001), June 12-15, 2001, Compiegne, France.

  5. The Sixth Meeting of Saudi Association for Mathematical Sciences, April 9-10, 2002, King Saud University, Riyadh, Saudi Arabia.     The Seventh Meeting for Saudi Association for Mathematical Sciences, April 7-8, 2004, Prince Sultan University, Riyadh, Saudi Arabia.

  6. Order Statistical Data: Approximation , Bounds and Characterizations, International Conference, Izmir University of Economics, 15-18 June 2005, Izmir, Turkey.

  7. The Third Saudi Science Conference " New Horizons in Science and Their Applications", 10-13 March,2007, Riyadh, Saudi Arabia.