The document discusses abrasive jet machining (AJM), which is a machining process where material is removed from a workpiece by an abrasive stream of particles propelled by gas or liquid. In the process, abrasive particles are accelerated to high velocities by a carrier gas and directed towards the workpiece through a nozzle to erode away material. Key factors that influence the process include the abrasive material, carrier gas properties, nozzle design and operating parameters. AJM can precisely cut hard and brittle materials and provide high surface quality finishes, with applications in electronics, aerospace and other industries.