The aim of IeCCS 2005, which was held in May 2005, was to bring together leading scientists of the international Computer Science community and to attract original research papers. This volume in the Lecture Series on Computer and Computational Sciences contains the extended abstracts of the presentations.The topics covered included (but were not limited to):Numerical Analysis, Scientific Computation, Computational Mathematics, Mathematical Software, Programming Techniques and Languages, Parallel Algorithms and its Applications, Symbolic and Algebraic Manipulation, Analysis of Algorithms, Problem Complexity, Mathematical Logic, FormalLanguages, Data Structures, Data Bases, Information Systems, Artificial Intelligence, Expert Systems, Simulation and Modeling, Computer Graphics, Software Engineering, Image Processing, Computer Applications, Hardware, Computer Systems Organization, Software, Data, Theory of Computation, Mathematics of Computing, Information Systems, Computing Methodologies, Computer Applications, Computing Milieu