Consulting services in the field of the business management; design, installation and maintenance of computer equipment for others; installation of computer systems and networks used to support electronically based businesses; maintenance of electronic mail and other electronic means of communication on a computer network, and monitoring and maintaining security for computer equipment, electronic mail, other means of electronic communications, telephone, data and video functions; design and development of electronic systems and networks for support of electronically based business, and consulting services in the field of the maintenance of information technology