The Computer Society of Iran (CSI) and Sharif University of Technology are jointly organizing the 18th International Symposium on Computer Architecture and Digital Systems (CADS2015) to be held on October 7-8, 2015 in Tehran, Iran. Sharif University of Technology, as one of the top five ranked universities in engineering and computer sciences in the Middle East with its strong research culture will host researchers, scientists, engineers, and practitioners in the fields of computer architecture and digital systems, to exchange their latest research results and findings. It is anticipated that the meeting will gather many people from all around the world.