2 December 2013
Last updated at 14:50
The first BBC 'ident', the logo seen before a TV programme starts, was broadcast in 1953. It was a complex mechanical brass device, with a tiny spinning globe at its centre. It was nicknamed the 'Bat's wings' logo.
During the 1960's the BBC's most famous logo, the globe, appeared. These logos featured a continuity announcer speaking the words 'This is BBC Television'.
In 1969, BBC 1 included the word 'colour' in the station logo. It could have been seen as a little reminder of what was possible to the vast majority of viewers still watching black and white and encourage them to buy a colour TV.
Before the introduction of computer-generated graphics, the BBC idents were all mechanical models filmed by a black and white camera. The colour was added electronically, making it extremely easy to change the colour for each new look.
By 1985, computer graphics technology had become good enough to retire the mechanical mirror globe. The new idents showed a semi-transparent blue globe with golden continents and gold BBC 1.
In 1997, the globe was dramatically reinvented through a sequence of hot air balloons, filmed on location around the UK. Over the next two and a half years, around 59 different versions of the BBC One balloon were made.
In the early 2000's the BBC One balloon and globe images were replaced by a sequence of new 'Rhythm & Movement' idents, featuring new multi-cultural themes with a range of people dancing to different music styles.
Nowadays, the dancing logos have been replaced by a new circular style, with pictures that cover much more of what the BBC shows on TV including swimming hippos, motorbike stunt riders, footballers and the moon.