Electrical telegraphy
A number of privately owned electrical telegraph companies operated in the United Kingdom of Great Britain and Ireland from … 展开

World Wide Web hyperlink patent
In 2001, BT discovered it owned a patent (U.S. patent 4,873,662) which it believed gave it patent rights on the use of hyperlink technology … 展开

Records of the Post Office Corporation (Telecommunications division) 1969–1981 and its predecessors (including Post Office Telegraph and Telephone Service 1864–1969 and some private telegraph and telephone companies) are Public Records, and are held by 展开

BT Group is a holding company; the majority of its businesses and assets are held by its wholly owned subsidiary British Telecommunications plc. BT's businesses are operated under … 展开

Buildings and facilities
As BT operates in around 180 countries, it owns and leases a range of buildings and facilities in the UK and around the world. In 2001, it sold some of its UK property portfolio for £2.38 billion to Telereal Trillium in a … 展开

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• UK telephone area codes (STD codes) 展开

• Baldwin, F.G.C. The History of the Telephone in the United Kingdom (1925)
• Foreman-Peck, J. "The development and diffusion of telephone … 展开