There is a designer in the UK that explores the mental impression that famous brands have built up over time. Its shocking to me to see how quickly I can recognize some these brands based simply on geometry, color, and size proportions. See if you read the code.
(answers at the bottom)
visit the website for more brands:
A. Google, B. Subway, C. Apple, D. Dunkin' Donuts, E. NBC, F. Burger King, G. Flickr, H. Ikea