The IEEE Computational Intelligence Society (CIS) focuses on computational and theoretical aspects of mimicking nature for problem solving. CIS core technologies include neural, fuzzy, and evolutionary computation, as well as hybrid intelligent systems that contain these and other related paradigms. The Society has its own history of transformation from the Neural Network Council to the Neural Network Society to the current CIS. While many of the core technologies that define the CIS were developed early in the history of computing, their application has expanded tremendously over the last two decades to include intelligent computer games, biomedical applications, data-mining, and so forth and represents its own exciting and growing field of engineering.