GS0401: Custom manufacturing services in the field of electronics; Custom manufacturing of telecommunications, computer, and electronic data storage equipment, components, devices, sub-assemblies and systems
GS0421: Product research, development, design, improvement and testing of new products for others; Engineering, design, research and development of new products for others; Engineering services for telecommunications, computer, and electronic data storage; Technical support services, namely, troubleshooting of computer hardware, software and electronics problems