Your initial thought when looking at the Amazon logo might be that the arrow looks like a smiley face, meaning Amazon is there to make its customers happy. Well, notice that the arrow is pointing from the a to the z; representing the fact that Amazon provides a variety of items for sale, literally from A to Z.
2. McDonald's
it really means "M" for McDonald's and there really isn't any other meaning McDonald's had intended. Instead, it came to mean something unintentionally by customers, at least according to design consultant and psychologist Louis Cheskin. In the '60s, McDonald's wanted to change their logo but Cheskin insisted on leaving the golden arches. He said it's because customers unconsciously recognize the logo as "symbolism of a pair of nourishing breasts" (via BBC). Whether we unconsciously believe this or not, Cheskin convinced them and now the logo is one of the most recognizable in the world.
3. Apple
If you guessed that the Apple logo has to do with the creation story of Adam and Eve, then you guessed correctly. It represents the forbidden fruit from the "Tree of Knowledge"
4. IBM
IBM’s logo has a hidden message for the whole world hidden in the Big Blue logo that represents it’s company. The white lines passing through give the appearance of the equal sign in the lower right corner, representing equality.
5. Adidas
Ever notice that Adidas' symbol looks like a mountain? Well, that's exactly what it's supposed to mean. The three stripes, which was part of the original logo in 1967, never really meant anything. It was just supposed to be unique. In the '90s, though, they slanted the stripes so that it would represent a mountain, which stands for the obstacles people need to overcome.
