This book constitutes the refereed proceedings of the 9th International Conference on Evolvable Systems, ICES 2010, held in York, UK, in September 2010.The papers are organized in topical sections on evolving digital circuits; artificial development; GPU platforms for bio-inspired algorithms; implementations and applications of neural networks; test, repair and reconfiguration using evolutionary algorithms; applications of evolutionary algorithms in hardware; reconfigurable hardware platforms; applications of evolution to technology; and novel methods in evolutionary design.