Artificial Intelligence (AI) is the skill of a computer program or a machine to think and learn, in other words mimic human's learning capability. Most of the older AI techniques are just boosted programming tactics nowadays. The major difference between normal'computer program' and AI is, in first case programmer is the one providing all the smartness to the system by programming it in as a World Model, and in lateral case the system learns by itself by referring past experience and training. In earlier AI techniques that were built in the beginning of AI evolvement, 'Real world modeling' approach was preferred. "Do not model the Real World; Instead, Model the Mind."