Based on tree-based coding structure and specific functions of the operator, the model can be flexibly built and developed by using the simple technique of computational intelligence. Based on pre-defined instruction / operator sets, flexible neural tree model can be created and evolved. This volume consists of 6 chapters including the introductory chapter giving the fundamental definitions and final chapter gives some important research challenges. Academics, scientists and engineers engaged in research, development and application of computational intelligence techniques and data mining will find comprehensive coverage of this book is invaluable.