Engineering; Computer network configuration services; Consulting in the field of engineering; Data security consultancy; Design and development of software and hardware for communication systems; Design and development of wireless communication systems for transmission and reception of voice, data and video; Design of unified communications services; Engineering services in the field of communication systems and computer systems; Engineering services, namely, engineering for the communications technology sector; Maintenance and updating of computer software; Maintenance of computer software used for communication systems; Software development consulting in the field of communication systems; Technological research in the field of commuciations and communication systems; Computer security consultancy; Computer network security consultancy; Design and development of wireless computer networks; Internet security consultancy; Computer and communication systems engineering