The 20th International Conference on Computer Theory and Applications (ICCTA 2010) will be organized by the Computer Scientific Society (CSS) in cooperation with IEEE organization –Alexandria subsection. The purpose of ICCTA 2010 is to serve as a multi-disciplinary forum for the exchange of information on research, development, and applications of all topics related to computer theory and its applications. ICCTA 2010 provides opportunities to researchers, specialists and vendors of Information Technology to get together and exchange ideas and expertise.