O2 (UK) they can do it too" in reference to Vodafone and EE, O2's biggest competitors and the UK's top three mobile-telecoms companies. 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
University of Electro-Communications common with that of school name which is "to establish an university which is open to all over Japan, by call it by a name without any geographical name". The "Times Higher Education World University Rankings" 2018 ranks UEC in the bracket of the 801-1000 best universities in the world. University of Electro-Communications The is a national university in the city of Chōfu, Tokyo, Japan. It specialises in the disciplines of computer science, the physical sciences, engineering and technology. It was founded in 1918 as the Technical Institute for Wireless-Communications. The University of Electro-communications was founded in the Azabu district,