O2 (UK) O2 (UK) Telefónica UK Limited (trading as O2 – stylised as O) is a telecommunications services provider in the United Kingdom, owned by the Spanish multinational Telefónica, and is headquartered in Slough. With 25 million subscribers (as of December 2017), O2 is the second-largest mobile network operator in the United Kingdom after EE, with Vodafone in third place. O2 was formed in 1985 as Cellnet, a 60:40 joint venture between BT Group and Securicor. In 1999, BT Group acquired Securicor's share of Cellnet and the company was later rebranded as BT Cellnet. In June 2000, BT Cellnet launched the world's
Communications Technology Satellite provided a satellite uplink truck for access to the CTS satellite. The piece was produced in two parts, "Phase I", which was a critique of satellite technology and whether it would become accessible to the public rather than the commercial & military purposes for the technology at that time, using feeds sent over the satellite by the artist and other participants, and "Phase II", which featured excerpts of the feeds sent. Communications Technology Satellite The Communications Technology Satellite, also known as Hermes, was an experimental high-power direct broadcast communications satellite. It was a joint effort of Canada's Department of Communications,