renting of commercial premises and engineering space; leasing of real estate; real estate management; consultancy and advisory services relating to the aforesaid

installation, repair and maintenance services relating to computers and communication systems; specialized building construction services; interior refurbishment of buildings; maintenance, repair and renovation of buildings, facilities and parts and fittings thereof; cleaning of buildings (interior and exterior surfaces) and facilities; consultancy and advisory services relating to the aforesaid

telecommunication services, namely provision of fibre optic links; provision of direct exchange lines, telex services, facsimile services, electronic messaging services, global satellite links, broadband Integrated Services Digital Network (ISDN), in-building wireless communications; provision of video conferencing and teleconferencing services; provision of facilities for the transmission, storage and processing of data and provision of audio and video services, all by means of communication...