In this Subject, I will share my class notes of Problem State Space, Non Heuristic Search Techniques, Heuristic Search Techniques, Propositional and Predicate Logic, Scripts, Frames, Semantic Nets, Rule Based System and Natural Language Processing. I have included lots of Gate Questions which may helpful for the students for competitive examination like GATE, DRDO, ISRO and GPSC. I have refered NPTEL website for above content.