42 Consultation and advisory services in the fields of computer hardware, computer software, computer peripherals, computer systems, computer networks, and computer security; design and development of computer hardware and software; design and development of data warehousing systems; design and development of telecommunications systems; design of computer displays and graphics; design of security and audit procedures for computer systems; network design services; integration and configuration of computer systems and computer networks; installation, maintenance and repair of computer software, computer systems, computer peripherals and computer networks; information technology support services; information technology service support centres and helpdesks