Turning is the most common machining operation used today. The process involves removing material from the outside or inside of a rotating workpiece. Turning generally uses a single-point, non-rotating tool to create the desired product. Most turning operations combine two movements: tool movement and workpiece rotation. The cutting tool moves lengthwise and crosswise along a rotating workpiece. Drilling, tapping, and reaming operation are always performed on the center of the workpiece endface. For some turning operations, the workpiece remains stationary while a revolving tool removes material. This is possible on machines with live tooling capabilities. Turning operations are performed on a lathe. In the past, a lathe was powered by a steam engine. Today, the lathe is powered by electricity and controlled by a sophisticated Computer Numerical Control, or CNC machine.