The Iranian Operations Research Society (IORS), is honored to invite everyone engaged in research, teaching, business, or public services related to Operational Research to attend the 3rd Conference on Operational Research, which will be held in Amirkabir University of Technology, Tehran, Iran. The general aim of the Conference is to facilitate the exchange of scientific and technical information related to Operational Research and to promote international co-operation An exhibition will be organized at the Conference Location in order to enable various industries and companies to present their products and services. For all inquiries regarding: meeting activities and functions, registrations, letter of invitation, technical services about the exhibition etc, please contact the Conference Secretariat.