The BBC (BBC) is a British broadcaster of public service. Its headquarters are located at Broadcasting House in Westminster, London, and is the oldest national broadcasting organization in the world  and the largest radio station in the world by number of employees. It has more than 20,950 employees in total, of which 16,672 are broadcasting in the public sector.      The total number of staff is 35,402 when part-time, flexible and fixed-time recruits are included. 
The BBC is established in accordance with a Royal Charter  and operates under its Agreement with the Secretary of State for Culture, Media and Sport.  His work is financed mainly by an annual television license fee  that is charged to all British households, companies and organizations that use any type of equipment to receive or record live television broadcasts and Capture iPlayer.  The rate is set by the British Government, agreed by Parliament,  and is used to finance BBC radio, television and online services that cover the nations and regions of the United Kingdom. Since April 1, 2014, it has also funded the BBC World Service (launched in 1932 as the BBC Empire Service), which broadcasts in 28 languages and offers comprehensive television, radio and online services in Arabic and Persian
About a quarter of the BBC revenue comes from its commercial arm BBC Studios Ltd (formerly BBC Worldwide), which sells BBC programs and services internationally and also distributes the BBC World News, 24 hours a day , BBC World News and BBC.com. , provided by BBC Global News Ltd.
Since its inception, until the Second World War (where its transmissions helped unite the nation), in the 21st century, the BBC has played a leading role in British culture. It has also been known as « The Beeb » and « Auntie ».
The first public broadcast of Great Britain live from the factory in Chelmsford Marconi took place in June 1920. It was sponsored by Daily Mail’s Lord Northcliffe and featured the famous Australian soprano Dame Nellie Melba. The emission of Melba captured the imagination of the people and marked a turning point in the attitude of the British public to the radio.  However, this public enthusiasm was not shared in official circles where these emissions were held to interfere with important military and civil communications. By the end of 1920, the pressure of these quarters and the concern among the licensing authority staff, the General Post Office (GPO), was sufficient to prohibit Chelmsford emissions. 
But in 1922, the GPO had received about 100 emission license requests  and moved to terminate its ban after a request of 63 wireless companies with more than 3,000 members.  Concerned about avoiding the same chaotic expansion experienced in the United States, the GPO proposed issuing a single broadcast license to a company jointly owned by a consortium of major wireless receiver manufacturers, which would be known as British Broadcasting Company Ltd. John Reith, a Scottish Calvinian, was appointed its managing director in December 1922 a few weeks after the company made its first official broadcast.  The company had to be funded by a royalty on the sale of wireless reception sets from the BBC of authorized manufacturers. To this day, the BBC wants to follow the Reithian directive to « inform, educate and have fun. »