Blibbet is the name of the O-like symbol in the original Microsoft logo. A lot of old school Microsofties have fond memories of the blibbet. It’s been memorialized in the “Save the Blibbet” campaign and honored by the “Blibbet Burger” served in the MS cafeterias.
Here’s a mouse cake of the blibbet for ex-Microsoftie Rick Saada celebrating his birthday and some products of the time he worked on back in the day (like ‘Money for Bob’!).
From a cursory search of the net on the Blibbet, we learn that this was the second Microsoft logo and was itself replaced in 1987. Also, some blibbet fans like Larry Osterman recall that ‘when Microsoft announced that they would be retiring the blibbet, a number of employees mounted a fruitless “Save the Blibbet” campaign to retain the corporate icon.’