Unconventional Machining Processes:- Abrasive jet machining- principles, applications, process parameters. Ultrasonic Machining- principles, applications, analysis of process parameters. Electro-chemical machining and grinding: principles, choice of electrolytes, applications. Electric discharge machining- principles, selection of tool matetials and dielectric fluid. Electon beam machining- Generation of electron beam, relative merits and demerits. Laser beam machining- principles and applications.