42 providing systems and software engineering and implementation services, namely, planning, design, development and testing of software programs and integration of new technologies with existing software programs; providing engineering, testing and evaluation of electronic systems; providing engineering, design management and operation of research and development laboratories for laser and sensor technologies; developing computer simulation and modeling tools; providing information systems design services, namely, defining client requirements, analyzing design alternatives and planning implementation of information systems; developing and providing system life cycle support for custom computer software applications systems; providing design and development of computer hardware and software programs in the fields of national defense and security systems and providing computer simulation, modeling and/or analysis for information systems and government systems; providing telecommunications network design, implementation, security and operations