The first version of the boxed logo appeared on screens in 1927. The boxes were squares while the letters were slanted.
Soon the boxes also became slanted.
With the adoption of colour on BBC1 in 1969, the BBC logo was altered slightly by letting the boxes have rounded corners.
During the 1970s, the corporate logo was gradually phased out on television in favour of specific logos for BBC1 and BBC2.
A new corporate logo was adopted in 1988. It was designed by Michael Peters.
It wasn't seen in television idents until 1991, when both BBC1 and BBC2 were overhauled.
The current BBC logo was adopted in 1997.