Amazon.com

Amazon's iconic logo expresses friendly simplicity with its famous yellow smile cleverly doubling as an arrow pointing from A to Z (as in, Amazon sells everything from A to Z), while the warm yellow color offsets the strength and confidence of its black text. Showing careful attention to detail, the '.com' is de-emphasized with a thinner version of the font and even the edge of the 'a' lines up with the start of the smile on the left while the contour of the 'z' is shaped by the smile's corner on the right.