42 Designing of metalworking machines, machine tools, loaders, gantry loaders, conveyors, cranes, robots, and parts thereof; designing of industrial facilities composed of metalworking machines, machine tools, loaders, gantry loaders, conveyors, cranes, and robots; providing technical information and advice regarding the performance and operation of metalworking machines, machine tools, loaders, gantry loaders, conveyors, cranes and robots; computer programming and maintenance of computer software for others; testing and research of metalworking machines, machine tools, loaders, gantry loaders, conveyors, cranes and robots; testing and research for the prevention of pollution, namely, reducing the discharge of industrial waste and noise from metalworking and machine tools; testing and research regarding the conservation of electrical power; repair of recorded computer software; and repair of recorded computer operating programs