Machinery parts are essential components of any machine, and two of the most common are COGS and cams. COGS, also known as gears, are toothed wheels that interlock with each other to transfer motion from one part of a machine to another. Cams are curved surfaces that convert rotary motion into linear motion, allowing for the operation of valves and other mechanisms. Both COGS and cams are essential components of many machines, and together they form the basis of much of modern machinery.