The following is a nonexhaustive list of topics: threaded fasteners, welding drawings, manufacturing materials, functional drafting, drawing for numerical control, belts, chains, gears, couplings, clutches, brakes, speed reducers, bearings, lubricants, cams, linkages, actuators, intersections, pipes, structural drafting, electrical drawings, jigs, die design, applied mechanics, engineering tolerancing, descriptive geometry, and computer-aided design and drafting.