A column of ternary content addressable memory cells includes a bit line pair that is twisted at a location at or near the center of the column. An endpoint detection process for an oxygen free and nitrogen free plasma process comprises monitoring an optical emission signal of an afterburner excited species in an exhaust conduit of the plasma asher apparatus. The alphanumeric keys are disposed in an ortholinear array, with substantially vertical columns and substantially horizontal rows and functional keys are grouped into rationally apportioned areas below the alphanumeric keys of the keyboard. Due to high clearances within the valve, the valve may be used with abrasive materials, delicate materials and foodstuffs. In a second embodiment, the device includes a tubular strut with an opening sized to receive the pedal arm of the brake pedal and a lock bar which may be slid forwardly following movement of the pedal arm into the opening to trap the pedal arm in the opening. A metal fastener is provided including a top radially enlarged portion, a bottom radially enlarged portion and a shank portion intermediate the thicker portions for forming a circumferential groove about the axis and fastener.