This volume offers a broad spectrum of sample works developed in leading research throughout the world about innovative methodologies swarm intelligence and swarm intelligent systems engineering base as well as applications and interesting experiences using the particle swarm optimization. In particular, particle swarm optimization, also known as PSO, mimics the behavior of a bunch of insects or schools of fish. If one particle finds a good path to food the rest of gang will be able to follow instantly even if they are a long way in working together.