Today's modern machine shops and tool and die shops are now environmentally controlled with dedicated me-trology labs for quality control and inspection. They have integrated the use of more computer numerical control (CNC) machine tools, but they have still retained the ability to use conventional machines. A modern jobbing shop today will still have conventional machines such as mills, lathes, assorted drill presses, saws, and some of the precision equipment used prior to CNC (such as surface grinders, jig borers, and cylindrical and tool and cutter grinders).