42 Design, engineering, research, development and testing services in the fields of computer software, mechanical systems, electrical systems, materials, materials synthesis, biological systems, chemistry, engineering and mathematical systems; research and engineering services in the field of security and security systems; Providing scientific and laboratory research services in the fields of computer software, mechanical systems, electrical systems, materials, materials synthesis, biological systems, chemistry, engineering and mathematical systems; Providing scientific and laboratory research information in the fields of computer software, mechanical systems, electrical systems, materials, materials synthesis, biological systems, chemistry, engineering and mathematical systems; Research and development in the fields of computer software, mechanical systems, electrical systems, materials, materials synthesis, biological systems, chemistry, engineering and mathematical systems; Scientific research