Engineering, design, scientific research and development, modeling and simulation and testing services in the fields of weapons systems engineering, aerospace engineering, and information technology; computer software consultation; computer software design for others; computer software development; computer systems analysis; computer-aided engineering services for others; consultancy in the field of software design; consulting services in the field of design, selection, implementation and use of computer hardware and software systems for others; technical support services, namely, troubleshooting of computer hardware and software problems; and, technical support services, namely, troubleshooting of industrial process control computer software problems; technical consultation services in the fields of computer security, network security and information security