7 Drilling machines and machine tools, namely, automated power tongs, automated drawworks, topdrives, power catwalks, snubbing and jacking units, and rigarms; drilling rig top drives, automated floor wrenches, and drawworks in the nature of hoisting apparatus; machine tools, namely, automated casing running tools; oil and gas drilling machine tools, namely, automated catwalks; information systems comprising computer hardware, computer software and electronic controls and alarms used to monitor, display, relay and archive drilling information and to control the functions, processes and operations of oil and gas drilling rig equipment, sold as a component part of said oil and gas drilling rig machines