42 Engineering; consulting in the fields of engineering, aeronautics and astronautical engineering, biological engineering, chemical engineering, civil and environmental engineering, electrical engineering and computer science, materials science and engineering, mechanical engineering, and nuclear science and engineering; providing laboratory study programs in the nature of laboratory research programs in the fields of engineering, aeronautics and astronautical engineering, biological engineering, chemical engineering, civil and environmental engineering, electrical engineering and computer science, engineering systems, materials science and engineering, mechanical engineering, and nuclear science and engineering; providing scientific research programs in the fields of engineering, aeronautics and astronautical engineering, biological engineering, chemical engineering, civil and environmental engineering, electrical engineering and computer science, engineering systems, materials science and engineering, mechanical engineering, and nuclear science and engineering; conducting research for others in the fields of engineering, aeronautics and astronautical engineering, biological engineering, chemical engineering, civil and environmental engineering, electrical engineering and computer science, materials science and engineering, mechanical engineering, and nuclear science and engineering; conducting laboratory research for others in the fields of engineering, aeronautics and astronautical engineering, biological engineering, chemical engineering, civil and environmental engineering, electrical engineering and computer science, engineering systems, materials science and engineering, mechanical engineering, and nuclear science and engineering