Proceedings of the 2012 International Conference on Computer and Automation Engineering, 4th (ICCAE 2012), January 14-15, 2012, in Mumbai, India. The objective of ICCAE 2012 is to provide a platform for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Computer and Automation Engineering. This conference provides opportunities for the delegates to exchange new ideas and application experiences face to face, to establish business or research relations and to find global partners for future collaboration.