The big yellow "D" is the logo for Square-D, a manufacturer of circuit breakers.
durex
Nokia Connecting People
edgar snyder
dog. a dog is big sometimes but small to us :D
D & backwards D in logo
Well, take Mcdonalds for example. You know the big m sign??? well when you are looking for mcdonalds in the phone book or wherever, its easier to find the big m instead of the word mcdonalds in plain text. and its kinda like when people see your logo, they think of your company or whatever it is that you do, and then they might remember it better when they need it or something... Logo is the first step to brand a company. It give a face to the company. For example, the Mc D logo. It's just a logo. We know them today because of their successful branding campaign. That' what make them popular (beside the burger of course). But, the campaign are held together by the image of the M logo. Imagine a Mc D advertisement without the Big M sign. Can you? ;)
Overstock .com has the big red O as its logo.
adidas
Small Wonder - 1985 Big J the D-J- 3-20 was released on: USA: 27 February 1988
Ducati
Dell